G.f. A(x,y) = Sum_{n>=0} x^n/(1-y)^(2*n+1) * Sum_{k=0..3*n} T(n,k)*y^k satisfies: y = Sum_{n=-oo..+oo} (-1)^n * x^(n*(n+1)/2) * A(x,y)^n.

A355870

G.f. A(x,y) = Sum_{n>=0} x^n/(1-y)^(2*n+1) * Sum_{k=0..3*n} T(n,k)*y^k satisfies: y = Sum_{n=-oo..+oo} (-1)^n * x^(n*(n+1)/2) * A(x,y)^n.

Terms

    a(0) =1a(1) =0a(2) =3a(3) =-3a(4) =1a(5) =0a(6) =9a(7) =-18a(8) =21a(9) =-15a(10) =6a(11) =-1a(12) =0a(13) =22a(14) =-56a(15) =116a(16) =-182a(17) =196a(18) =-140a(19) =64a(20) =-17a(21) =2a(22) =0a(23) =51a(24) =-144a(25) =496a(26) =-1329a(27) =2436a(28) =-3148a(29) =2934

External references