402072
domain: N
Appears in sequences
- Expansion of 1/(1-x^2-2*x^3).at n=33A052947
- Expansion of (1 + x)^2 / ((1 - x^2 - 2*x^3)*(1 + x^4)).at n=31A107849
- Column 2 of triangle A113988, which is the matrix square of A113983: a(n) = [A113983^2](n+2,2).at n=8A113991
- Expansion of x^2/(1-x^2-2*x^3).at n=35A159287
- The Ze2 sums of the Pell-Jacobsthal triangle A013609.at n=11A180678
- Number of 4Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1s.at n=7A297522