a(n) = 196*n^2 + 14.

Terms

a(0) =14a(1) =210a(2) =798a(3) =1778a(4) =3150a(5) =4914a(6) =7070a(7) =9618a(8) =12558a(9) =15890a(10) =19614a(11) =23730a(12) =28238a(13) =33138a(14) =38430a(15) =44114a(16) =50190a(17) =56658a(18) =63518a(19) =70770a(20) =78414a(21) =86450a(22) =94878a(23) =103698a(24) =112910a(25) =122514a(26) =132510a(27) =142898a(28) =153678a(29) =164850