OFFSET
1,2
COMMENTS
Conjecture. If n>2 and a(n) is a multiple of 3, then a(n)/3 is a prime; further, all odd primes are given as a(n)/3 for some n. (This has been verified up to n=2000.)
CROSSREFS
KEYWORD
nonn
AUTHOR
John W. Layman, Oct 09 2006
STATUS
approved