G.f. satisfies: A(x) = (1 + x*A(x))^2 * (1 + 3*A(x)) / 4.
A231553
G.f. satisfies: A(x) = (1 + x*A(x))^2 * (1 + 3*A(x)) / 4.
Terms
- a(0) =1a(1) =8a(2) =116a(3) =2096a(4) =42396a(5) =918648a(6) =20851812a(7) =489417440a(8) =11781479180a(9) =289276719464
External references
- oeis: A231553