31126

Appears in sequences

• Numbers n such that n^1024 + 1 is prime (a generalized Fermat prime).at n=33A057002
• Number of one-element transitions among all integer partitions of the integers from m=0 to m=n in the unlabeled case.at n=19A096586
• Expansion of (x-1)^2/(1-x^2-2*x^3).at n=32A159286
• Numbers k such that k^2 + 1 = p*q, p and q primes and |p-q| is square.at n=40A187401
• G.f.: A(x) = exp( Sum_{n>=1} G_n(x^n)^3 * x^n/n ) such that G_n(x^n) = Product_{k=0..n-1} A(u^k*x) where u is an n-th root of unity.at n=7A203268
• a(n) is the smallest positive number k such that (product of the first n odd primes) + k^2 is a square.at n=11A349708