A137121 Numbers k such that k and k^2 use only the digits 3, 4, 5, 6 and 7.

6, 66, 74, 76, 666, 744, 6666, 6734, 6756, 7574, 57756, 66666, 66756, 67434, 67656, 74474, 74476, 577734, 666666, 666756, 667334, 667566, 667656, 745356, 745476, 6666666, 6666756, 6667566, 6667656, 6674334, 6734744, 6756734, 7373376, 7453574, 7465744, 7466434, 7533576, 7574744, 66666666, 66666756, 66667566, 66667656, 66673334

Offset

1,1

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..224

J. Wellons, Tables of Shared Digits [archived]

Example

757473746453656^2 = 573766476566537535636555766336.

Crossrefs

Sequence in context: A327228 A359854 A284067 * A110222 A119230 A122780

Adjacent sequences: A137118 A137119 A137120 * A137122 A137123 A137124

Keyword

base,nonn,changed

Author

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

Status

approved