Expansion of 1/(1-3x*c(4x)), where c(x) is the g.f. of A000108.
A132863
Expansion of 1/(1-3x*c(4x)), where c(x) is the g.f. of A000108.
Terms
- a(0) =1a(1) =3a(2) =21a(3) =195a(4) =2085a(5) =24243a(6) =297909a(7) =3806883a(8) =50082885a(9) =673851795a(10) =9229863381a(11) =128273819523
External references
- oeis: A132863