Number of integer partitions of 2n with reverse-alternating sum >= 0.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =15a(5) =27a(6) =48a(7) =81a(8) =135a(9) =220a(10) =352a(11) =553a(12) =859a(13) =1313a(14) =1986a(15) =2969a(16) =4394a(17) =6439a(18) =9357a(19) =13479a(20) =19273a(21) =27353a(22) =38558a(23) =53998a(24) =75168a(25) =104022a(26) =143172a(27) =196021a(28) =267051a(29) =362086