Expansion of e.g.f. exp( x^3/6 + x^4/24 ).

Terms

a(0) =1a(1) =0a(2) =0a(3) =1a(4) =1a(5) =0a(6) =10a(7) =35a(8) =35a(9) =280a(10) =2100a(11) =5775a(12) =21175a(13) =200200a(14) =1051050a(15) =4029025a(16) =30655625a(17) =238238000a(18) =1262661400a(19) =7977995025a(20) =70443998625a(21) =511496986000