Row sums of triangle A118190: a(n) = Sum_{k=0..n} 5^(k*(n-k)) for n>=0.
A118191
Row sums of triangle A118190: a(n) = Sum_{k=0..n} 5^(k*(n-k)) for n>=0.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =52a(4) =877a(5) =32502a(6) =2740627a(7) =507843752a(8) =214111484377
External references
- oeis: A118191