Expansion of g.f.: 1/(1 - 7*x*c(x)), where c(x) is the g.f. for A000108.
A126694
Expansion of g.f.: 1/(1 - 7*x*c(x)), where c(x) is the g.f. for A000108.
Terms
- a(0) =1a(1) =7a(2) =56a(3) =455a(4) =3710a(5) =30282a(6) =247254a(7) =2019087a(8) =16488710a(9) =134656130a(10) =1099686056a(11) =8980749862a(12) =73342721956a(13) =598965319960
External references
- oeis: A126694