Expansion of (-1 + Product_{k>=1} (1 + x^k)^k)^3.

Terms

a(0) =1a(1) =6a(2) =27a(3) =92a(4) =279a(5) =762a(6) =1952a(7) =4725a(8) =10968a(9) =24551a(10) =53346a(11) =112932a(12) =233755a(13) =474288a(14) =945384a(15) =1854517a(16) =3585534a(17) =6841182a(18) =12895246a(19) =24035841a(20) =44337672a(21) =80999765a(22) =146644746a(23) =263249169a(24) =468817933a(25) =828658233a(26) =1454315508a(27) =2535217624a(28) =4391290854a(29) =7560034419