57696

Appears in sequences

• Numbers n such that n, n+1, n+2, n+3, n+4 are all of the form x^2+2*y^2 for nonnegative x, y.at n=30A096783
• Expansion of 1/(1 - Sum_{k>=2} mu(k)^2*x^k), where mu(k) is the Moebius function (A008683).at n=29A280197
• G.f. = Phi^3*F^3, where Phi = g.f. for A028930, F = g.f. for A028959.at n=17A328534
• a(n) is the determinant of the 2 X 2 matrix whose entries (when read by rows) are the n-th primes congruent to 1, 3, 5, 7 mod 8 respectively.at n=23A337145
• Number of permutations of [n] where each pair of adjacent elements is coprime and does not differ by a prime.at n=19A368958
• Number of rooted ordered trees with n non-root nodes such that all leaf nodes can be k different colors where k is the degree of their parent node.at n=6A384613