G.f. satisfies A(x) = exp( Sum_{k>=1} (-1)^(k+1) * (3^k + A(x^k)) * x^k/k ).
A363543
G.f. satisfies A(x) = exp( Sum_{k>=1} (-1)^(k+1) * (3^k + A(x^k)) * x^k/k ).
Terms
- a(0) =1a(1) =4a(2) =7a(3) =23a(4) =69a(5) =234a(6) =826a(7) =3000a(8) =11168a(9) =42313a(10) =162829a(11) =634052a(12) =2495051a(13) =9903761a(14) =39612048a(15) =159481988a(16) =645833656a(17) =2628829700a(18) =10749777653a(19) =44139474552a(20) =181916530895a(21) =752288709592
External references
- oeis: A363543