OFFSET
1,1
REFERENCES
R. K. Guy, Unsolved Problems in Number Theory, Springer, 2013, p. 137.
W. Sierpiński, Teoria liczb, cz. II, PWN, Warsaw, 1959, pp. 47-48.
LINKS
A. Schinzel, Sur un problème de P. Erdos, Colloquium Mathematicum 5 (1958), pp. 198-204.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Arkadiusz Wesolowski, Feb 10 2018
STATUS
approved