OFFSET
1,1
COMMENTS
a(9) is the 2-digit number 07.
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..10000
EXAMPLE
a(2) = 18 because 18 is the first 2-digit number to appear 2 times in the decimal expansion of e = 2.7(18)28(18)...
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Bobby Jacobs, Nov 05 2016
STATUS
approved