OFFSET
1,2
LINKS
J. Bamberg, G. Cairns and D. Kilminster, The crystallographic restriction, permutations and Goldbach's conjecture, Amer. Math. Monthly, 110 (March 2003), 202-209.
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Mar 08 2003
EXTENSIONS
More terms from Vladeta Jovovic, Mar 09 2003
STATUS
approved