A136873 Numbers k such that k and k^2 use only the digits 0, 1, 5, 7 and 9.

0, 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000, 9777075001, 10000000000, 97770750010, 100000000000, 717997055001, 959050150501, 977707500100, 1000000000000, 7179970550010, 7550970170501, 9590501505010, 9777075001000, 10000000000000, 71799705500100, 75509701705010

Offset

1,3

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..37

J. Wellons, Tables of Shared Digits [archived]

Example

7550970170501^2 = 57017150515795901010591001.

Crossrefs

Sequence in context: A348783 A260522 A260521 * A135655 A178500 A178501

Adjacent sequences: A136870 A136871 A136872 * A136874 A136875 A136876

Keyword

base,nonn

Author

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

Status

approved