Diagonal in triangle A291560: a(n) = -A291560(n+1, n) for n>=1.
A291561
Diagonal in triangle A291560: a(n) = -A291560(n+1, n) for n>=1.
Terms
- a(0) =1a(1) =10a(2) =315a(3) =18900a(4) =1819125a(5) =255405150a(6) =49165491375
External references
- oeis: A291561