51286

Appears in sequences

• Number of factorable (see A057765 for definition) subsets of a 2 X n uniform grid.at n=10A057818
• G.f.: exp( Sum_{n>=1} sigma(n*2^n)*x^n/n ).at n=9A176310
• Poincaré series for invariant polynomial functions on the space of binary forms of degree 15.at n=11A293940
• a(n) = coefficient of x^n in A(x) such that 1 = Sum_{n=-oo..+oo} (-x)^n * (A(x) + x^(n-1))^(n+1).at n=8A359711
• Truncate Stirling's asymptotic series for 2! after n terms and round to the nearest integer.at n=45A362114
• Integers k such that 1023*2^k - 1 is prime.at n=29A387926