Column 1 of triangle A113988, which is the matrix square of A113983: a(n) = [A113983^2](n+1,1).
A113990
Column 1 of triangle A113988, which is the matrix square of A113983: a(n) = [A113983^2](n+1,1).
Terms
- a(0) =1a(1) =4a(2) =12a(3) =36a(4) =116a(5) =416a(6) =1680a(7) =7656a(8) =39256a(9) =225348a(10) =1439868a(11) =10179116a(12) =79153484a(13) =673262240a(14) =6231517920a(15) =62461031920a(16) =675005395152
External references
- oeis: A113990