Number of partitions of n into parts 5k+1 or 5k+4.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =3a(7) =3a(8) =4a(9) =5a(10) =6a(11) =7a(12) =9a(13) =10a(14) =12a(15) =14a(16) =17a(17) =19a(18) =23a(19) =26a(20) =31a(21) =35a(22) =41a(23) =46a(24) =54a(25) =61a(26) =70a(27) =79a(28) =91a(29) =102