Triangular array a(n,k) = (1/k)*Sum_{i=0..k} (-1)^(k-i)*binomial(k,i)*i^n; n >= 1, 1 <= k <= n, read by rows.
A028246
Triangular array a(n,k) = (1/k)*Sum_{i=0..k} (-1)^(k-i)*binomial(k,i)*i^n; n >= 1, 1 <= k <= n, read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =2a(6) =1a(7) =7a(8) =12a(9) =6a(10) =1a(11) =15a(12) =50a(13) =60a(14) =24a(15) =1a(16) =31a(17) =180a(18) =390a(19) =360a(20) =120a(21) =1a(22) =63a(23) =602a(24) =2100a(25) =3360a(26) =2520a(27) =720a(28) =1a(29) =127
External references
- oeis: A028246