a(n) = n! * [x^n] exp(x)/(1 - log(1+x)).

Terms

a(0) =1a(1) =2a(2) =4a(3) =9a(4) =23a(5) =70a(6) =244a(7) =1015a(8) =4605a(9) =25090a(10) =137516a(11) =963589a(12) =5832243a(13) =54685670a(14) =310755964a(15) =4567695283a(16) =15162041017a(17) =581160322338