Tetranacci numbers starting with first four cubes.

Terms

a(0) =1a(1) =8a(2) =27a(3) =64a(4) =100a(5) =199a(6) =390a(7) =753a(8) =1442a(9) =2784a(10) =5369a(11) =10348a(12) =19943a(13) =38444a(14) =74104a(15) =142839a(16) =275330a(17) =530717a(18) =1022990a(19) =1971876a(20) =3800913a(21) =7326496a(22) =14122275a(23) =27221560a(24) =52471244a(25) =101141575a(26) =194956654a(27) =375791033a(28) =724360506a(29) =1396249768