Number of partitions of 2n+1 in which no parts are multiples of 4.

Terms

a(0) =1a(1) =3a(2) =6a(3) =12a(4) =22a(5) =38a(6) =64a(7) =105a(8) =166a(9) =258a(10) =395a(11) =592a(12) =876a(13) =1280a(14) =1846a(15) =2636a(16) =3728a(17) =5222a(18) =7256a(19) =10006a(20) =13696a(21) =18624a(22) =25169a(23) =33808a(24) =45164a(25) =60022a(26) =79366a(27) =104457a(28) =136870a(29) =178572