A136832 Numbers k such that k and k^2 use only the digits 0, 1, 2, 7 and 8.

0, 1, 10, 11, 100, 101, 110, 1000, 1001, 1010, 1011, 1100, 1101, 10000, 10001, 10010, 10011, 10100, 10110, 11000, 11001, 11010, 87811, 100000, 100001, 100010, 100011, 100100, 100101, 100110, 101000, 101001, 101100, 110000, 110001, 110010, 110100, 878110, 1000000, 1000001, 1000010, 1000011, 1000100, 1000101, 1000110, 1001000, 1001010

Offset

1,3

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..1393

J. Wellons, Tables of Shared Digits [archived]

Example

282880202080101^2 = 80021208728878778127220170201.

Crossrefs

Sequence in context: A136829 A262381 A278038 * A136808 A136836 A136827

Adjacent sequences: A136829 A136830 A136831 * A136833 A136834 A136835

Keyword

base,nonn,changed

Author

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

Status

approved