95699

Appears in sequences

• Expansion of e.g.f. exp(-x)/(1-4*x).at n=5A001907
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of the e.g.f. exp(-x)/(1 - k*x).at n=50A320032
• a(1) = 1; a(2) = 1; for n >= 3, a(n) = a(n-1) / gcd(a(n-1), n-1) + a(n-2) / gcd(a(n-2), n-2).at n=46A330806
• The number of vertices formed by straight line segments mutually connecting all vertices of a semicircular polygon defined in A333642.at n=37A330913
• Triangle read by rows: T(n, k) = n! * 4^k * hypergeom([-k], [-n], -1/4).at n=20A375612