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Decomposition of A001102

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Numbers n such that n / (sum of digits of n) is a square.
A001102(n) = A000000(n) * A000000(n) + A000000(n)
Download CSV of the decomposition of A001102 (9999 lines.)
Decomposition of A001102 - 9994 dots.

Decomposition of Semiprimes

3D graph (WebGL) / 2D graph - First 500 terms
Semiprimes (or biprimes): products of two primes.
A001358(n) = A130533(n) * A184729(n) + A065516(n)
Download CSV of the decomposition of Semiprimes (10000 lines.)
Decomposition of Semiprimes - 9998 dots.

Decomposition of Lesser of twin primes

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Lesser of twin primes.
A001359(n) = A000000(n) * A000000(n) + A053319(n)
Download CSV of the decomposition of Lesser of twin primes (10000 lines.)
Decomposition of Lesser of twin primes - 9996 dots.

Decomposition of A001463

3D graph (WebGL) / 2D graph - First 500 terms
Partial sums of A001462; also a(n) is the last occurrence of n in A001462.
A001463(n) = A000000(n) * A000000(n) + A001462(n-1)
Download CSV of the decomposition of A001463 (9999 lines.)
Decomposition of A001463 - 9996 dots.

Decomposition of A001481

3D graph (WebGL) / 2D graph - First 500 terms
Numbers that are the sum of 2 nonnegative squares.
A001481(n) = A000000(n) * A000000(n) + A000000(n)
Download CSV of the decomposition of A001481 (9999 lines.)
Decomposition of A001481 - 9995 dots.

Decomposition of A001494

3D graph (WebGL) / 2D graph - First 500 terms
Numbers n such that phi(n) = phi(n+2).
A001494(n) = A000000(n) * A000000(n) + A000000(n)
Download CSV of the decomposition of A001494 (9999 lines.)
Decomposition of A001494 - 9994 dots.

Decomposition of A001651

3D graph (WebGL) / 2D graph - First 500 terms
Numbers not divisible by 3.
A001651(n) = A000000(n) * A000000(n) + A000034(n)
Download CSV of the decomposition of A001651 (9999 lines.)
Decomposition of A001651 - 9997 dots.

Decomposition of A001742

3D graph (WebGL) / 2D graph - First 500 terms
List of numbers whose digits contain no loops (version 2).
A001742(n) = A000000(n) * A000000(n) + A000000(n)
Download CSV of the decomposition of A001742 (9999 lines.)
Decomposition of A001742 - 9995 dots.

Decomposition of A001743

3D graph (WebGL) / 2D graph - First 500 terms
Every digit contains at least one loop (version 1).
A001743(n) = A000000(n) * A000000(n) + A000000(n)
Download CSV of the decomposition of A001743 (9999 lines.)
Decomposition of A001743 - 9992 dots.

Decomposition of A001744

3D graph (WebGL) / 2D graph - First 500 terms
Numbers n such that every digit contains a loop (version 2).
A001744(n) = A000000(n) * A000000(n) + A000000(n)
Download CSV of the decomposition of A001744 (9999 lines.)
Decomposition of A001744 - 9992 dots.