OFFSET
1,2
COMMENTS
Generated with DrScheme.
From Robert Israel, Jun 12 2019: (Start)
If k is in the sequence, then so is 10*k.
Includes 10^a - 3*10^b for b < a.
The rightmost nonzero digit of k must be 7; the leftmost digit must be 0, 7 or 9. (End)
LINKS
Jonathan Wellons, Table of n, a(n) for n = 1..121
J. Wellons, Tables of Shared Digits [archived]
EXAMPLE
999999999999997^2 = 999999999999994000000000000009.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
STATUS
approved