Number of compositions (ordered partitions) of n into two or more triangular numbers.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =3a(5) =4a(6) =6a(7) =11a(8) =16a(9) =25a(10) =39a(11) =61a(12) =94a(13) =147a(14) =227a(15) =350a(16) =546a(17) =846a(18) =1309a(19) =2030a(20) =3147a(21) =4875a(22) =7558a(23) =11715a(24) =18154a(25) =28136a(26) =43609a(27) =67586a(28) =104747a(29) =162346