Number of partitions p of 2n+1 such that n - (number of parts of p) is a part of p.

Terms

a(0) =0a(1) =0a(2) =1a(3) =5a(4) =13a(5) =31a(6) =59a(7) =109a(8) =180a(9) =301a(10) =461a(11) =712a(12) =1051a(13) =1547a(14) =2200a(15) =3138a(16) =4349a(17) =6036a(18) =8211a(19) =11146a(20) =14901a(21) =19908a(22) =26232a(23) =34513a(24) =44953a(25) =58412a(26) =75244a(27) =96752a(28) =123448a(29) =157201