110502

Appears in sequences

• Numbers k such that 2^(k+1) - 1 is prime.at n=28A090748
• Exponents m such that 1-A065395(2^m) is a power of 2, where A065395(n) = sigma(phi(n)) - phi(sigma(n)).at n=33A092591
• Numbers n such that n*((2^61-1)^4) - 1 and n*((2^61-1)^4) + 1 are twin primes.at n=4A099231
• Number T(n,k) of colored set partitions of [n] where exactly k colors are used for the elements; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=30A323099