Irregular triangle T(n, k) = [x^k]( p(n, x) ), where p(n, x) = (1/x)*(1-x)^(3*n+1)*Sum_{k >= 0} (k*(k+1)*(2*k+1)/6)^n*x^k and p(0, x) = 1, read by rows.
A174264
Irregular triangle T(n, k) = [x^k]( p(n, x) ), where p(n, x) = (1/x)*(1-x)^(3*n+1)*Sum_{k >= 0} (k*(k+1)*(2*k+1)/6)^n*x^k and p(0, x) = 1, read by rows.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =18a(5) =42a(6) =18a(7) =1a(8) =1a(9) =115a(10) =1539a(11) =5065a(12) =5065a(13) =1539a(14) =115a(15) =1a(16) =1a(17) =612a(18) =30369a(19) =359056a(20) =1439038a(21) =2255448a(22) =1439038a(23) =359056a(24) =30369a(25) =612a(26) =1a(27) =1a(28) =3109a(29) =487944
External references
- oeis: A174264