Row sums of triangle A126450: a(n) = Sum_{k=0..n} C( C(n+2,3) - C(k+2,3) + 1, n-k).
A126453
Row sums of triangle A126450: a(n) = Sum_{k=0..n} C( C(n+2,3) - C(k+2,3) + 1, n-k).
Terms
- a(0) =1a(1) =3a(2) =15a(3) =218a(4) =7273a(5) =434654a(6) =40417797a(7) =5369210845a(8) =962496995941
External references
- oeis: A126453