Expansion of Product_{m>=1} (1+x^m)^7.

Terms

a(0) =1a(1) =7a(2) =28a(3) =91a(4) =259a(5) =665a(6) =1589a(7) =3585a(8) =7707a(9) =15925a(10) =31808a(11) =61677a(12) =116536a(13) =215180a(14) =389194a(15) =690935a(16) =1206016a(17) =2072700a(18) =3511851a(19) =5872545a(20) =9701097a(21) =15844866a(22) =25606840a(23) =40974528a(24) =64956836a(25) =102076289a(26) =159084401a(27) =245995792a(28) =377574402a(29) =575459136