OFFSET
1,3
COMMENTS
This is associated with conjecture (ii) in A181391 (van Eck's sequence). - Po-chia Chen, Jun 20 2019
LINKS
N. J. A. Sloane, Table of n, a(n) for n = 1..15099.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 18 2010
STATUS
approved