a(n) = 1369*n^2 - 37.

Terms

a(0) =1332a(1) =5439a(2) =12284a(3) =21867a(4) =34188a(5) =49247a(6) =67044a(7) =87579a(8) =110852a(9) =136863a(10) =165612a(11) =197099a(12) =231324a(13) =268287a(14) =307988a(15) =350427a(16) =395604a(17) =443519a(18) =494172a(19) =547563a(20) =603692a(21) =662559a(22) =724164a(23) =788507a(24) =855588a(25) =925407a(26) =997964a(27) =1073259a(28) =1151292a(29) =1232063