Triangle read by rows: T(n,k) = (n+1-k)*|s(n,n+1-k)| - 2*|s(n-1,n-k)|, where s(n,k) are the signed Stirling numbers of the first kind and 1 <= k <= n.
A199221
Triangle read by rows: T(n,k) = (n+1-k)*|s(n,n+1-k)| - 2*|s(n-1,n-k)|, where s(n,k) are the signed Stirling numbers of the first kind and 1 <= k <= n.
Terms
- a(0) =-1a(1) =0a(2) =1a(3) =1a(4) =4a(5) =2a(6) =2a(7) =12a(8) =18a(9) =6a(10) =3a(11) =28a(12) =83a(13) =88a(14) =24a(15) =4a(16) =55a(17) =270a(18) =575a(19) =500a(20) =120a(21) =5a(22) =96a(23) =705a(24) =2490a(25) =4324a(26) =3288a(27) =720a(28) =6a(29) =154
External references
- oeis: A199221