Squares of (odd numbers not divisible by 5).

Terms

a(0) =1a(1) =9a(2) =49a(3) =81a(4) =121a(5) =169a(6) =289a(7) =361a(8) =441a(9) =529a(10) =729a(11) =841a(12) =961a(13) =1089a(14) =1369a(15) =1521a(16) =1681a(17) =1849a(18) =2209a(19) =2401a(20) =2601a(21) =2809a(22) =3249a(23) =3481a(24) =3721a(25) =3969a(26) =4489a(27) =4761a(28) =5041a(29) =5329