n - (sum of prime factors of n) is a positive square.

Terms

a(0) =1a(1) =6a(2) =22a(3) =54a(4) =68a(5) =164a(6) =166a(7) =336a(8) =388a(9) =454a(10) =588a(11) =854a(12) =886a(13) =1086a(14) =1122a(15) =1124a(16) =1636a(17) =1710a(18) =1828a(19) =2182a(20) =2356a(21) =2468a(22) =2702a(23) =2960a(24) =3046a(25) =3048a(26) =3708a(27) =3748a(28) =3770a(29) =4036