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

Terms

a(0) =1a(1) =1a(2) =4a(3) =13a(4) =29a(5) =81a(6) =188a(7) =456a(8) =1030a(9) =2405a(10) =5295a(11) =11611a(12) =25246a(13) =53552a(14) =113332a(15) =235685a(16) =486011a(17) =990840a(18) =2006567a(19) =4018010a(20) =7992003a(21) =15768511a(22) =30875424a(23) =60060509a(24) =116042548a(25) =222817961a(26) =425200270a(27) =806991037a(28) =1522748592a(29) =2858792520