Irregular triangle T(n, k) = [x^k]( p(n, x) ), where p(n, x) = (1/x)*(1-x)^n*(1+x)^(n+2)*( Sum_{j >= 0} j^(n+1)*x^j ), read by rows.
A165891
Irregular triangle T(n, k) = [x^k]( p(n, x) ), where p(n, x) = (1/x)*(1-x)^n*(1+x)^(n+2)*( Sum_{j >= 0} j^(n+1)*x^j ), read by rows.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =1a(5) =6a(6) =10a(7) =6a(8) =1a(9) =1a(10) =14a(11) =47a(12) =68a(13) =47a(14) =14a(15) =1a(16) =1a(17) =30a(18) =176a(19) =450a(20) =606a(21) =450a(22) =176a(23) =30a(24) =1a(25) =1a(26) =62a(27) =597a(28) =2392a(29) =5162
External references
- oeis: A165891