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

Terms

a(0) =0a(1) =1a(2) =1a(3) =10a(4) =55a(5) =307a(6) =2026a(7) =14779a(8) =114157a(9) =933616a(10) =8110261a(11) =74525167a(12) =719925328a(13) =7279859485a(14) =76855303981a(15) =845280487018