Triangle where the g.f. of row n is: Sum_{k=0..n^2-n+1} T(n,k)*y^k = (2*(1+y)^n - 1) * ((1+y)^n - 1)^(n-1) / y^(n-1), as read by rows.
A220265
Triangle where the g.f. of row n is: Sum_{k=0..n^2-n+1} T(n,k)*y^k = (2*(1+y)^n - 1) * ((1+y)^n - 1)^(n-1) / y^(n-1), as read by rows.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =9a(4) =8a(5) =2a(6) =9a(7) =72a(8) =177a(9) =222a(10) =163a(11) =72a(12) =18a(13) =2a(14) =64a(15) =800a(16) =3696a(17) =9800a(18) =17408a(19) =22284a(20) =21340a(21) =15554a(22) =8652a(23) =3633a(24) =1120a(25) =240a(26) =32a(27) =2a(28) =625a(29) =11250
External references
- oeis: A220265