O.g.f. satisfies: A(x) = Sum_{n>=0} n^n * x^n * A(n^2*x^2)^n/n! * exp(-n*x*A(n^2*x^2)).
A216247
O.g.f. satisfies: A(x) = Sum_{n>=0} n^n * x^n * A(n^2*x^2)^n/n! * exp(-n*x*A(n^2*x^2)).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =15a(5) =77a(6) =354a(7) =2509a(8) =19369a(9) =146840a(10) =1321773a(11) =13466872a(12) =151177886a(13) =1827144180a(14) =23686530621a(15) =335038346222
External references
- oeis: A216247