Number of partitions of n into terms of (1,4)-Ulam sequence, cf. A003666.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =4a(7) =5a(8) =7a(9) =8a(10) =11a(11) =13a(12) =17a(13) =20a(14) =25a(15) =30a(16) =38a(17) =44a(18) =54a(19) =63a(20) =77a(21) =90a(22) =107a(23) =124a(24) =148a(25) =171a(26) =202a(27) =231a(28) =271a(29) =310