A058421 Numbers k such that k^2 contains only digits {0,1,8}, not ending with zero.

1, 9, 109, 901, 1009, 9001, 10009, 10401, 90001, 100009, 100901, 900001, 1000009, 1004001, 8954391, 9000001, 10000009, 10009001, 34351141, 90000001, 100000009, 100040001, 900000001, 1000000009, 1000090001, 3163554991, 9000000001, 10000000009, 10000400001

Offset

1,2

Links

Zhao Hui Du, Table of n, a(n) for n = 1..91

Patrick De Geest, Index to related sequences

Hisanori Mishima, Sporadic tridigital solutions

Crossrefs

Cf. A058422.

Sequence in context: A001691 A157906 A166846 * A267795 A128876 A199030

Adjacent sequences: A058418 A058419 A058420 * A058422 A058423 A058424

Keyword

nonn,base

Author

Patrick De Geest, Nov 15 2000

Extensions

Terms a(28) and above from Zhao Hui Du, Mar 07 2024

Status

approved