Numbers k such that k^2 contains only digits {0,4,9}, not ending with zero.

A058443

Numbers k such that k^2 contains only digits {0,4,9}, not ending with zero.

Terms

    a(0) =2a(1) =3a(2) =7a(3) =97a(4) =212a(5) =997a(6) =3148a(7) =9997a(8) =20102a(9) =99997a(10) =999997a(11) =2001002a(12) =3074003a(13) =9999997a(14) =99999997a(15) =200010002a(16) =999999997a(17) =9999999997a(18) =20000100002a(19) =99999999997a(20) =953671853653a(21) =999999999997

External references