a(n) = (10*n + 6)^2.

Terms

a(0) =36a(1) =256a(2) =676a(3) =1296a(4) =2116a(5) =3136a(6) =4356a(7) =5776a(8) =7396a(9) =9216a(10) =11236a(11) =13456a(12) =15876a(13) =18496a(14) =21316a(15) =24336a(16) =27556a(17) =30976a(18) =34596a(19) =38416a(20) =42436a(21) =46656a(22) =51076a(23) =55696a(24) =60516a(25) =65536a(26) =70756a(27) =76176a(28) =81796a(29) =87616