G.f. satisfies A(x) = 1 + x*(1 + x*A(x)^4)^6.
A137972
G.f. satisfies A(x) = 1 + x*(1 + x*A(x)^4)^6.
Terms
- a(0) =1a(1) =1a(2) =6a(3) =39a(4) =320a(5) =2787a(6) =25788a(7) =247731a(8) =2449188a(9) =24753960a(10) =254610962a(11) =2656496133a(12) =28046838948a(13) =299085697722
External references
- oeis: A137972