Row sums of triangle A111975, which shifts columns left and up under matrix square.
A111977
Row sums of triangle A111975, which shifts columns left and up under matrix square.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =13a(4) =57a(5) =369a(6) =3681a(7) =59073a(8) =1579393a(9) =72188673a(10) =5749089793a(11) =809616264193
External references
- oeis: A111977