G.f. A(x) satisfies: x = A(x) * (1 + 2*A(x)) * (1 - 3*A(x)).
A250889
G.f. A(x) satisfies: x = A(x) * (1 + 2*A(x)) * (1 - 3*A(x)).
Terms
- a(0) =1a(1) =1a(2) =8a(3) =35a(4) =248a(5) =1554a(6) =11184a(7) =79431a(8) =591800a(9) =4445870a(10) =34121360a(11) =264561310a(12) =2076527152a(13) =16438316260a(14) =131209328736
External references
- oeis: A250889