OFFSET
1,1
COMMENTS
According to the theorem in the December 1996 issue of Le Petit Vert, these numbers consist of 3, 6 and the composite numbers greater than 8. - Peter Munn, Aug 20 2024
LINKS
Ray Chandler, Table of n, a(n) for n = 1..10000
Le Petit Vert, Problem 47, p.20, September 1996. (in French)
Le Petit Vert, Solution of problem 47, pp. 21-22, December 1996. (in French)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Christian Amet, Apr 17 2010
EXTENSIONS
Extended by Ray Chandler, Mar 23 2016
STATUS
approved