a(n) = 38*(38*n^2 - 1).

Terms

a(0) =1406a(1) =5738a(2) =12958a(3) =23066a(4) =36062a(5) =51946a(6) =70718a(7) =92378a(8) =116926a(9) =144362a(10) =174686a(11) =207898a(12) =243998a(13) =282986a(14) =324862a(15) =369626a(16) =417278a(17) =467818a(18) =521246a(19) =577562a(20) =636766a(21) =698858a(22) =763838a(23) =831706a(24) =902462a(25) =976106a(26) =1052638a(27) =1132058a(28) =1214366a(29) =1299562