Expansion of 1 + x*(1 + 2*x^2*(1 + 3*x^3*(1 + 4*x^4*(1 + ...)^4)^3)^2).

Terms

a(0) =1a(1) =1a(2) =0a(3) =2a(4) =0a(5) =0a(6) =12a(7) =0a(8) =0a(9) =18a(10) =144a(11) =0a(12) =0a(13) =432a(14) =576a(15) =2880a(16) =0a(17) =4320a(18) =9408a(19) =23040a(20) =21600a(21) =109440a(22) =172800a(23) =110880a(24) =662400a(25) =832320a(26) =2678400a(27) =4060800a(28) =10296000a(29) =9412992