OFFSET
1,2
COMMENTS
The sequence is started with a(1)=1 and always extended with the smallest integer not yet present that does not lead to a contradiction.
LINKS
Eric Angelini, Table of n, a(n) for n = 1..1001
EXAMPLE
The blocks of nonprime digits are indicated hereunder by parentheses; the successive block-sizes are 1, 2, 3, 4, 6, 5, ... which reproduces the sequence itself: (1),2,3,(4,6),5,7,(8,9,1)2,(10,11),2(0,14,16,1)3,(18,19,1)5,...
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Eric Angelini and Lars Blomberg, Aug 04 2016
STATUS
approved