-517
domain: Z
Appears in sequences
- E.g.f. is cos(tan(x)/cos(x)), coefficients of even powers of x.at n=3A009081
- First order recursion: a(0)=1; a(n) = sigma(1,n) - a(n-1).at n=53A083238
- Row sums of triangle A132898.at n=21A132899
- Inverse binomial transform of -2 followed by A000032(n+1).at n=13A244213
- G.f. A(x) satisfies: A(x) = A(A(x)^2) / (x - x^2).at n=9A265941
- First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 537", based on the 5-celled von Neumann neighborhood.at n=49A272793
- Dirichlet inverse of A333794.at n=29A378524