Number of parts in all partitions of 2n into parts with multiplicity <= n.

Terms

a(0) =0a(1) =1a(2) =8a(3) =24a(4) =65a(5) =150a(6) =330a(7) =657a(8) =1274a(9) =2338a(10) =4172a(11) =7203a(12) =12171a(13) =20045a(14) =32474a(15) =51623a(16) =80867a(17) =124841a(18) =190406a(19) =286857a(20) =427758a(21) =631367a(22) =923544a(23) =1339226a(24) =1926798a(25) =2751094a(26) =3900931a(27) =5494411a(28) =7690923a(29) =10701618