G.f. A(x) satisfies: 4 = Sum_{n=-oo..oo} (-x)^(n*(n+1)/2) * A(x)^(n*(n-1)/2).
A354664
G.f. A(x) satisfies: 4 = Sum_{n=-oo..oo} (-x)^(n*(n+1)/2) * A(x)^(n*(n-1)/2).
Terms
- a(0) =3a(1) =28a(2) =756a(3) =28200a(4) =1205228a(5) =55731456a(6) =2714642292a(7) =137199520340
External references
- oeis: A354664