E.g.f.: exp( sum(n>=1, x^(n!) / n ) ).

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =26a(6) =316a(7) =1912a(8) =14204a(9) =83260a(10) =513496a(11) =2918576a(12) =43605112a(13) =442060984a(14) =5396258960a(15) =51589877536a(16) =502620599056