Odd nonprimes squared, or A014076(n)^2.

Terms

a(0) =1a(1) =81a(2) =225a(3) =441a(4) =625a(5) =729a(6) =1089a(7) =1225a(8) =1521a(9) =2025a(10) =2401a(11) =2601a(12) =3025a(13) =3249a(14) =3969a(15) =4225a(16) =4761a(17) =5625a(18) =5929a(19) =6561a(20) =7225a(21) =7569a(22) =8281a(23) =8649a(24) =9025a(25) =9801a(26) =11025a(27) =12321a(28) =13225a(29) =13689