Column 1 of triangle A126454; a(n) = C( C(n+3,3) + 1, n).
A126456
Column 1 of triangle A126454; a(n) = C( C(n+3,3) + 1, n).
Terms
- a(0) =1a(1) =5a(2) =55a(3) =1330a(4) =58905a(5) =4187106a(6) =437353560a(7) =63140314380
External references
- oeis: A126456