A137000 Numbers k such that k and k^2 use only the digits 1, 2, 4, 8 and 9.

1, 2, 9, 11, 12, 21, 22, 29, 91, 122, 141, 212, 221, 222, 288, 441, 911, 921, 1118, 1191, 1488, 2212, 2988, 11141, 11882, 14829, 21212, 22229, 42921, 49441, 49829, 49891, 122182, 141118, 141421, 221911, 491141, 491212, 498891, 498928, 498941, 921911, 992421, 1114891, 1411428, 2211882, 2212288, 2981428, 2988118, 4911122, 4911428, 4921882

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..666

J. Wellons, Tables of Shared Digits [archived]

Example

942984212484191^2 = 889219224994429881419424924481.

Crossrefs

Sequence in context: A207670 A176545 A072065 * A073634 A065554 A034042

Adjacent sequences: A136997 A136998 A136999 * A137001 A137002 A137003

Keyword

base,nonn

Author

Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008

Status

approved