A058443 Numbers k such that k^2 contains only digits {0,4,9}, not ending with zero.

2, 3, 7, 97, 212, 997, 3148, 9997, 20102, 99997, 999997, 2001002, 3074003, 9999997, 99999997, 200010002, 999999997, 9999999997, 20000100002, 99999999997, 953671853653, 999999999997, 2000001000002, 2118984413357, 2121179131852

Offset: 1

Author

Patrick De Geest, Nov 15 2000

Keywords

• nonn
• base

Links

• Zhao Hui Du, Table of n, a(n) for n = 1..54
• P. De Geest, Index to related sequences
• Hisanori Mishima, Sporadic tridigital solutions

Crossrefs

Cf. A058444.