Decomposition into weight × level + jump - all 2D graphs

Numbers n such that n + 3 and n - 3 are both prime.

A087695(n) = A000000(n) * A000000(n) + A000000(n)

Numbers n such that abs(sigma(n) - 2n) <= sqrt(n).

A088007(n) = A000000(n) * A000000(n) + A000000(n)

Primes p such that mu(p-1) = 1; that is, p-1 is squarefree and has an even number of prime factors, where mu is the Moebius function.

A088179(n) = A000000(n) * A000000(n) + A000000(n)

Primes p such that p^2+p-1 and p^2+p+1 are twin primes.

A088483(n) = A000000(n) * A000000(n) + A000000(n)

Numbers n such that n^2 + n - 1 and n^2 + n + 1 are twin primes.

A088485(n) = A000000(n) * A000000(n) + A000000(n)

Numbers having at least one divisor d>1 such that also d+1 is a divisor.

A088723(n) = A000000(n) * A000000(n) + A000000(n)

Primes p such that p-1 is cubefree.

A089189(n) = A000000(n) * A000000(n) + A000000(n)

Primes p such that p-1 and p+1 are cube- or higher power-free.

A089194(n) = A000000(n) * A000000(n) + A000000(n)

Numbers n such that n is divisible by the sum of its distinct prime factors (A008472).

A089352(n) = A000000(n) * A000000(n) + A000000(n)

Iban numbers (the letter i is banned from the English name of the number).

A089589(n) = A000000(n) * A000000(n) + A000000(n)