Expansion of 1/(1 - Sum_{k>=1} k^2*x^k/(1 - x^k)).

Terms

a(0) =1a(1) =1a(2) =6a(3) =21a(4) =82a(5) =294a(6) =1116a(7) =4103a(8) =15326a(9) =56833a(10) =211454a(11) =785441a(12) =2920058a(13) =10851016a(14) =40331874a(15) =149892024a(16) =557098510a(17) =2070493098a(18) =7695228038a(19) =28600012305a(20) =106294901116a(21) =395055313662