19564

Appears in sequences

• Numbers n such that n^1024 + 1 is prime (a generalized Fermat prime).at n=23A057002
• Number of primes of the form 12k + 1 less than 10^n.at n=5A091161
• Positions where A163890 obtains distinct new values.at n=23A163891
• Number of line segments connecting exactly 10 points in an n x n grid of points.at n=46A177726
• Partial sums of A004080.at n=9A194541
• Table of the elementary symmetric functions a_k(1,2,3,4,6,...,n+1) (5 missing).at n=33A196844
• Number of length n+5 0..3 arrays with some three disjoint pairs in each consecutive six terms having the same sum.at n=17A248484
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + 2*b(n-1) - b(n-2) - 1, where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=17A294564
• Numbers k such that sopfr(k) = tau(k)^2.at n=17A305026
• G.f. A(x) satisfies: x = Sum_{n>=1} x^n * (1+x)^(n^2/2) / A(x)^(n/2).at n=11A325155