OFFSET
1,1
LINKS
Paul Erdős, Carole B. Lacampagne, Carl Pomerance, J. L. Selfridge, On the Schnirelmann and asymptotic densities of sets of non-multiples, Proceedings of the sixteenth Southeastern international conference on combinatorics, graph theory and computing (Boca Raton, Fla., 1985). Congr. Numer. 48 (1985), 67--79. MR0830700 (87j:11013).
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Apr 06 2012
STATUS
approved