Numbers n such that the decimal number concat(7,n) is a square.

Terms

a(0) =29a(1) =84a(2) =225a(3) =396a(4) =569a(5) =744a(6) =921a(7) =1289a(8) =1824a(9) =2361a(10) =2900a(11) =3441a(12) =3984a(13) =4529a(14) =5076a(15) =5625a(16) =6176a(17) =6729a(18) =7284a(19) =7841a(20) =8400a(21) =8961a(22) =9524a(23) =10649a(24) =12336a(25) =14025a(26) =15716a(27) =17409a(28) =19104a(29) =20801