G.f. A(x) satisfies: 1 = Sum_{n>=0} (-1)^n * x^(n*(n+1)/2) * ((1+x)^n + A(x))^(n+1).
A341341
G.f. A(x) satisfies: 1 = Sum_{n>=0} (-1)^n * x^(n*(n+1)/2) * ((1+x)^n + A(x))^(n+1).
Terms
- a(0) =1a(1) =4a(2) =11a(3) =29a(4) =76a(5) =207a(6) =592a(7) =1780a(8) =5617a(9) =18365a(10) =61465a(11) =209173a(12) =720636a(13) =2505401a(14) =8773807a(15) =30919540a(16) =109581804a(17) =390360666a(18) =1397013258a(19) =5020578459a(20) =18111752521a(21) =65564995435a(22) =238097178090a(23) =867136619465
External references
- oeis: A341341