a(n) = 169*n^2 + n.

Terms

a(0) =170a(1) =678a(2) =1524a(3) =2708a(4) =4230a(5) =6090a(6) =8288a(7) =10824a(8) =13698a(9) =16910a(10) =20460a(11) =24348a(12) =28574a(13) =33138a(14) =38040a(15) =43280a(16) =48858a(17) =54774a(18) =61028a(19) =67620a(20) =74550a(21) =81818a(22) =89424a(23) =97368a(24) =105650a(25) =114270a(26) =123228a(27) =132524a(28) =142158a(29) =152130