a(n) = (11*n + 6)^2.

Terms

a(0) =36a(1) =289a(2) =784a(3) =1521a(4) =2500a(5) =3721a(6) =5184a(7) =6889a(8) =8836a(9) =11025a(10) =13456a(11) =16129a(12) =19044a(13) =22201a(14) =25600a(15) =29241a(16) =33124a(17) =37249a(18) =41616a(19) =46225a(20) =51076a(21) =56169a(22) =61504a(23) =67081a(24) =72900a(25) =78961a(26) =85264a(27) =91809a(28) =98596a(29) =105625