Column 3 of triangle A113988, which is the matrix square of A113983: a(n) = [A113983^2](n+3,3).
A113992
Column 3 of triangle A113988, which is the matrix square of A113983: a(n) = [A113983^2](n+3,3).
Terms
- a(0) =1a(1) =8a(2) =46a(3) =248a(4) =1366a(5) =7976a(6) =50186a(7) =342584a(8) =2541682a(9) =20478832a(10) =178809686a(11) =1687157648a(12) =17149281446a(13) =187185819536
External references
- oeis: A113992