Number of compositions (ordered partitions) of n into centered hexagonal numbers (A003215).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =2a(8) =3a(9) =4a(10) =5a(11) =6a(12) =7a(13) =8a(14) =10a(15) =13a(16) =17a(17) =22a(18) =28a(19) =36a(20) =45a(21) =56a(22) =70a(23) =88a(24) =111a(25) =140a(26) =178a(27) =226a(28) =286a(29) =361