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

Terms

a(0) =1a(1) =14a(2) =105a(3) =567a(4) =2478a(5) =9317a(6) =31269a(7) =95965a(8) =273896a(9) =735966a(10) =1879059a(11) =4591342a(12) =10797290a(13) =24549924a(14) =54171729a(15) =116368308a(16) =243991034a(17) =500446135a(18) =1006039762a(19) =1985480063a(20) =3852429483a(21) =7358212272a(22) =13850448185a(23) =25718189483a(24) =47150564517a(25) =85417834621a(26) =153015826880