Decomposition of A052406
Numbers without 4 as a digit.
Decomposition of A052413
Numbers without 5 as a digit.
Decomposition of A052414
Numbers without 6 as a digit.
Decomposition of Weak numbers
Weak numbers (i.e., not powerful (1)): there is a prime p where p|n is true but p^2|n is not true.
Decomposition of A052499
If n is in the sequence then so are 2n and 4n-1.
Decomposition of A053176
Primes p such that 2p+1 is composite.
Decomposition of A053184
Primes p such that p^2+p-1 is prime.
Decomposition of A053224
n for which sigma(n) < sigma(n+1).
Decomposition of A053432
Numbers with digits in alphabetical order (in English).
Decomposition of A053696
Numbers that can be represented as a string of three or more 1's in a base >= 2.