G.f.: Sum_{n >= 1} x^n/(1-x^n)^5.

Terms

a(0) =1a(1) =6a(2) =16a(3) =41a(4) =71a(5) =147a(6) =211a(7) =371a(8) =511a(9) =791a(10) =1002a(11) =1547a(12) =1821a(13) =2596a(14) =3146a(15) =4247a(16) =4846a(17) =6627a(18) =7316a(19) =9681a(20) =10852a(21) =13657a(22) =14951a(23) =19427a(24) =20546a(25) =25577a(26) =27916a(27) =34096a(28) =35961a(29) =44912