Column 2 of triangle A113988, which is the matrix square of A113983: a(n) = [A113983^2](n+2,2).
A113991
Column 2 of triangle A113988, which is the matrix square of A113983: a(n) = [A113983^2](n+2,2).
Terms
- a(0) =1a(1) =6a(2) =26a(3) =108a(4) =468a(5) =2194a(6) =11294a(7) =64152a(8) =402072a(9) =2773606a(10) =20981626a(11) =173331444a(12) =1557019148a(13) =15144482402a(14) =158854971230
External references
- oeis: A113991