OFFSET
1,1
COMMENTS
If a Crandall number C = A262961(n) is an even semiprime, then n is a term of this sequence. - Altug Alkan, Dec 30 2015
LINKS
David Broadhurst, Crandall Memorial Puzzle, Oct 04, 2015.
David Broadhurst, Crandall Memorial Puzzle [Cached copy, with permission]
David Broadhurst, Crandall memorial puzzle: solution and heuristics
David Broadhurst, Crandall memorial puzzle: solution and heuristics [Cached copy, with permission]
David Broadhurst, Feynman integrals, L-series and Kloosterman moments, arXiv:1604.03057, 2016.
EXAMPLE
5 is a term because A262961(5) = 302 and its prime divisors are 2, 151 and only 151 >= 5/2.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Dec 30 2015
STATUS
approved