G.f. A(x) satisfies A(x) = 1 + x * (1+x)^2 * A(x)^4.
A378786
G.f. A(x) satisfies A(x) = 1 + x * (1+x)^2 * A(x)^4.
Terms
- a(0) =1a(1) =1a(2) =6a(3) =39a(4) =296a(5) =2435a(6) =21138a(7) =190603a(8) =1767968a(9) =16761424a(10) =161697576a(11) =1582171216a(12) =15664531716a(13) =156637712953
External references
- oeis: A378786