a(n) = 120*n^3 + 60*n^2 + 2*n + 1.

Terms

a(0) =1a(1) =183a(2) =1205a(3) =3787a(4) =8649a(5) =16511a(6) =28093a(7) =44115a(8) =65297a(9) =92359a(10) =126021a(11) =167003a(12) =216025a(13) =273807a(14) =341069a(15) =418531a(16) =506913a(17) =606935a(18) =719317a(19) =844779a(20) =984041a(21) =1137823a(22) =1306845a(23) =1491827a(24) =1693489a(25) =1912551a(26) =2149733a(27) =2405755a(28) =2681337a(29) =2977199