A175366(n^2).

Terms

a(0) =1a(1) =7a(2) =27a(3) =57a(4) =93a(5) =125a(6) =251a(7) =275a(8) =341a(9) =493a(10) =613a(11) =637a(12) =847a(13) =991a(14) =1095a(15) =1317a(16) =1521a(17) =1713a(18) =1785a(19) =2079a(20) =2279a(21) =2555a(22) =2747a(23) =2969a(24) =3329a(25) =3593a(26) =3793a(27) =4051a(28) =4507a(29) =4747