Floor(exp(10/11)*n!).

Terms

a(0) =2a(1) =4a(2) =14a(3) =59a(4) =297a(5) =1787a(6) =12509a(7) =100076a(8) =900691a(9) =9006917a(10) =99076095a(11) =1188913146a(12) =15455870908a(13) =216382192724