Expansion of g/(1 - x^3*g^3), where g = 1+x*g^4 is the g.f. of A002293.
A391100
Expansion of g/(1 - x^3*g^3), where g = 1+x*g^4 is the g.f. of A002293.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =23a(4) =144a(5) =991a(6) =7225a(7) =54796a(8) =427865a(9) =3416438a(10) =27767325a(11) =228952073a(12) =1910444210a(13) =16102258455a(14) =136887790320
External references
- oeis: A391100