a(n) = T(n)^3 + n^3 where T(n) is a triangular number.

Terms

a(0) =2a(1) =35a(2) =243a(3) =1064a(4) =3500a(5) =9477a(6) =22295a(7) =47168a(8) =91854a(9) =167375a(10) =288827a(11) =476280a(12) =755768a(13) =1160369a(14) =1731375a(15) =2519552a(16) =3586490a(17) =5006043a(18) =6865859a(19) =9269000a(20) =12335652a(21) =16204925a(22) =21036743a(23) =27013824a(24) =34343750a(25) =43261127a(26) =54029835a(27) =66945368a(28) =82337264a(29) =100571625