login
A136921
Numbers k such that k and k^2 use only the digits 0, 2, 6 and 7.
0
0, 26, 260, 2600, 26000, 260000, 2600000, 26000000, 260000000, 2600000000, 26000000000, 260000000000, 2600000000000, 26000000000000, 260000000000000, 2600000000000000, 26000000000000000, 260000000000000000, 2600000000000000000, 26000000000000000000
OFFSET
1,2
COMMENTS
Generated with DrScheme.
LINKS
EXAMPLE
260000000000000^2 = 67600000000000000000000000000.
CROSSREFS
Sequence in context: A109467 A126547 A136922 * A042308 A251673 A059744
KEYWORD
base,nonn
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
EXTENSIONS
a(16)-a(20) from Pontus von Brömssen, May 01 2024
STATUS
approved