OFFSET
0,1
LINKS
Paolo Xausa, Table of n, a(n) for n = 0..10000
FORMULA
a(n) = 5^A062522(n). - Michel Marcus, Sep 30 2014
EXAMPLE
a(1) = 1 because 5^0 = 1 has "1" as a substring (not a proper substring, though).
a(2) = 25 because 5^2 = 25 has "2" as a substring.
a(3) = 3125 because 5^5 = 3125 has "3" as a substring.
MATHEMATICA
A176765[n_] := Block[{k = -1}, While[StringFreeQ[IntegerString[5^++k], IntegerString[n]]]; 5^k]; Array[A176765, 50, 0] (* Paolo Xausa, Apr 03 2024 *)
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Jonathan Vos Post, Apr 25 2010
EXTENSIONS
Corrected comment by Sean A. Irvine, May 05 2010
More terms from Sean A. Irvine and Jon E. Schoenfield, May 05 2010
a(0) prepended by Paolo Xausa, Apr 03 2024
STATUS
approved