Number of thrice-partitions of n.

Terms

a(0) =1a(1) =1a(2) =4a(3) =10a(4) =34a(5) =80a(6) =254a(7) =604a(8) =1785a(9) =4370a(10) =11986a(11) =29286a(12) =80355a(13) =193137a(14) =505952a(15) =1239348a(16) =3181970a(17) =7686199a(18) =19520906a(19) =46931241a(20) =117334784a(21) =282021070a(22) =693721166a(23) =1659075192a(24) =4063164983a(25) =9651686516a(26) =23347635094a(27) =55405326513a(28) =133021397071a(29) =313842472333