OFFSET
1,1
COMMENTS
Some of the numbers start with 0. For example, a(15) is the 4-digit number 0352.
The first two appearances of a(2) = 1828 appear consecutively as 18281828.
EXAMPLE
a(2) = 1828 because 1828 is the first 4-digit number to appear 2 times in the decimal expansion of e = 2.7(1828)(1828)...
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Bobby Jacobs, Aug 08 2017
STATUS
approved