OFFSET
1,1
COMMENTS
Note that the sequence contains elements whose number of digits is less than 4. See example.
The first 3 appearances of a(3) = 9999 overlap in 999999.
EXAMPLE
a(2) = 582 because "0582" is the first 4-digit number to appear 2 times in the decimal expansion of Pi = 3.1415926535897932384626433832795028841971693993751(0582)097494459230781\ 640628620899862803482534211706798214808651328230664709384460955(0582)...
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Bobby Jacobs, Sep 25 2016
EXTENSIONS
More terms from Alois P. Heinz, Oct 02 2016
STATUS
approved