Expansion of g^2/(1 - x^3*g^2), where g = 1+x*g^3 is the g.f. of A001764.
A391124
Expansion of g^2/(1 - x^3*g^2), where g = 1+x*g^3 is the g.f. of A001764.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =31a(4) =147a(5) =746a(6) =3965a(7) =21779a(8) =122656a(9) =704439a(10) =4109955a(11) =24291361a(12) =145133962a(13) =875142048a(14) =5318877972a(15) =32549441433a(16) =200392883700
External references
- oeis: A391124