a(n) = (11*n + 8)^2.

Terms

a(0) =64a(1) =361a(2) =900a(3) =1681a(4) =2704a(5) =3969a(6) =5476a(7) =7225a(8) =9216a(9) =11449a(10) =13924a(11) =16641a(12) =19600a(13) =22801a(14) =26244a(15) =29929a(16) =33856a(17) =38025a(18) =42436a(19) =47089a(20) =51984a(21) =57121a(22) =62500a(23) =68121a(24) =73984a(25) =80089a(26) =86436a(27) =93025a(28) =99856a(29) =106929