Decomposition of A004431
Numbers that are the sum of 2 distinct nonzero squares.
Decomposition of A004432
Numbers that are the sum of 3 distinct nonzero squares.
Decomposition of A004611
Divisible only by primes congruent to 1 mod 3.
Decomposition of A004613
Numbers that are divisible only by primes congruent to 1 mod 4.
Decomposition of A004614
Numbers that are divisible only by primes congruent to 3 mod 4.
Decomposition of A004742
Numbers n such that binary expansion does not contain 101.
Decomposition of A004743
Numbers n such that binary expansion does not contain 110.
Decomposition of A004744
Numbers n such that binary expansion does not contain 011.
Decomposition of A004745
Numbers n such that binary expansion does not contain 001.
Decomposition of A004746
Numbers n such that binary expansion does not contain 010.