a(n) = [x^n] (1 + p(x))^n, where p(x) is the g.f. of A000040.
A309955
a(n) = [x^n] (1 + p(x))^n, where p(x) is the g.f. of A000040.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =59a(4) =362a(5) =2287a(6) =14707a(7) =95762a(8) =629386a(9) =4166627a(10) =27743445a(11) =185602188a(12) =1246543559a(13) =8399791922a(14) =56762121398a(15) =384513835219
External references
- oeis: A309955