Expansion of Sum_{k>0} (x * (1 + (k * x)^k))^k.

Terms

a(0) =1a(1) =2a(2) =1a(3) =9a(4) =1a(5) =98a(6) =1a(7) =1025a(8) =2188a(9) =15626a(10) =1a(11) =692836a(12) =1a(13) =5764802a(14) =97656251a(15) =201326593a(16) =1a(17) =36138519442a(18) =1a(19) =409470748547a(22) =1a(28) =1