Number of parts in all partitions of 2n+1 that do not contain 1 as a part.

Terms

a(0) =0a(1) =1a(2) =3a(3) =8a(4) =20a(5) =41a(6) =80a(7) =153a(8) =271a(9) =469a(10) =795a(11) =1305a(12) =2102a(13) =3336a(14) =5190a(15) =7968a(16) =12090a(17) =18104a(18) =26821a(19) =39371a(20) =57220a(21) =82472a(22) =117958a(23) =167405a(24) =235945a(25) =330425a(26) =459803a(27) =636142a(28) =875307a(29) =1197983