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

Terms

a(0) =1a(1) =1a(2) =4a(3) =13a(4) =41a(5) =125a(6) =374a(7) =1103a(8) =3213a(9) =9259a(10) =26430a(11) =74806a(12) =210095a(13) =585890a(14) =1623240a(15) =4470232a(16) =12241799a(17) =33349751a(18) =90410255a(19) =243977941a(20) =655553258a(21) =1754265279a(22) =4676358086a(23) =12420299846a(24) =32873598566a(25) =86721264126a(26) =228051843891a(27) =597905347237