OFFSET
1,1
COMMENTS
This is conjectured to be a permutation of the positive integers.
LINKS
Carole Dubois, Table of n, a(n) for n = 1..5000
EXAMPLE
The leftmost digit of a(2) = 11 is 1; we duplicate this digit in position 1;
The leftmost digit of a(3) = 1 is 1; we duplicate this digit in position 3;
The leftmost digit of a(4) = 12 is 1; we duplicate this digit in position 4;
The leftmost digit of a(5) = 13 is 1; we duplicate this digit in position 6;
The leftmost digit of a(6) = 14 is 1; we duplicate this digit in position 8; etc.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Eric Angelini and Carole Dubois, Jul 05 2020
STATUS
approved