Decomposition of A039004
Numbers n such that representation in base 4 has same number of 1's and 2's.
Decomposition of A039770
Numbers n such that phi(n) is a perfect square.
Decomposition of A039955
Squarefree numbers congruent to 1 mod 4.
Decomposition of Even squarefree numbers
Even squarefree numbers.
Decomposition of A039957
Squarefree numbers congruent to 3 mod 4.
Decomposition of A040976
a(n) = n-th prime - 2.
Decomposition of A043096
Numbers in which every pair of adjacent digits are distinct.
Decomposition of A043489
Numbers n such that number of 0's in base 10 is 1.
Decomposition of A045468
Primes congruent to {1, 4} mod 5.
Decomposition of Sub-perfect powers
Sub-perfect powers: perfect powers (squares, cubes etc.) minus 1.