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A137037
Numbers k such that k and k^2 use only the digits 1, 3, 6 and 7.
0
1, 6, 131, 11731, 3336731, 3371376, 6113376, 33336731, 611361731
OFFSET
1,2
COMMENTS
Generated with DrScheme.
LINKS
EXAMPLE
611361731^2 = 373763166131316361.
CROSSREFS
Sequence in context: A281402 A137038 A024276 * A101131 A256239 A174250
KEYWORD
base,nonn,more
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
STATUS
approved