Expansion of Product_{k>=1} 1/(1-x^k)^binomial(k+6,7).

Terms

a(0) =1a(1) =1a(2) =9a(3) =45a(4) =201a(5) =819a(6) =3357a(7) =13329a(8) =52215a(9) =199686a(10) =750733a(11) =2774793a(12) =10112184a(13) =36357280a(14) =129131448a(15) =453379226a(16) =1574884565a(17) =5415956550a(18) =18450934294a(19) =62303210591a(20) =208624947952a(21) =693066815809