Expansion of e.g.f. exp(3*(exp(x) - 1) - x).

Terms

a(0) =1a(1) =2a(2) =7a(3) =29a(4) =142a(5) =785a(6) =4813a(7) =32240a(8) =233449a(9) =1812161a(10) =14980768a(11) =131174939a(12) =1211111629a(13) =11745451658a(14) =119255234371