A136947 Numbers k such that k and k^2 use only the digits 0, 3, 7, 8 and 9.

0, 3, 30, 300, 3000, 30000, 300000, 989803, 3000000, 8370783, 9889783, 9898030, 30000000, 83707830, 88830783, 89330333, 89380833, 89909833, 93803033, 98897830, 98980300, 300000000, 837078300, 878003303, 888307830, 893303330, 893808330, 893889803, 899098330, 938030330, 988978300, 989803000, 998998003, 3000000000

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..297

J. Wellons, Tables of Shared Digits [archived]

Example

998903093797083^2 = 997807390797383997790779308889.

Crossrefs

Sequence in context: A136929 A136935 A136942 * A093138 A361896 A073557

Adjacent sequences: A136944 A136945 A136946 * A136948 A136949 A136950

Keyword

base,nonn

Author

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

Status

approved