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

Terms

a(0) =1a(1) =12a(2) =78a(3) =370a(4) =1437a(5) =4848a(6) =14719a(7) =41148a(8) =107610a(9) =266296a(10) =628941a(11) =1427118a(12) =3127369a(13) =6646440a(14) =13746081a(15) =27744926a(16) =54782271a(17) =106029918a(18) =201512970a(19) =376630680a(20) =693161334a(21) =1257641676a(22) =2251764699a(23) =3982196910a(24) =6961522279a(25) =12038699766a(26) =20607718317a(27) =34938910360