Number of partitions of n into parts 4k+1 or 4k+2.

Terms

a(0) =1a(1) =2a(2) =2a(3) =3a(4) =4a(5) =6a(6) =7a(7) =9a(8) =11a(9) =15a(10) =18a(11) =23a(12) =27a(13) =34a(14) =41a(15) =50a(16) =59a(17) =72a(18) =85a(19) =103a(20) =120a(21) =143a(22) =167a(23) =198a(24) =230a(25) =270a(26) =313a(27) =366a(28) =422a(29) =491