129226

Appears in sequences

• Triangle T(n,k) of numbers of proper k-covers of an unlabeled n-set, k=1..2^n-2.at n=42A055127
• Numbers k such that k-3, k-5, k-17, k-257, and k-65537 are all primes.at n=31A063825
• The number of primes of the form i^2 + j^4 (A028916) <= 2^n, counted with multiplicity.at n=27A226496