OFFSET
1,2
COMMENTS
REFERENCES
H. Halberstam and K. F. Roth, Sequences, Oxford, 1966; see p. 6.
LINKS
PROG
(PARI) a(n)=if(n<3, n, n+7) \\ Charles R Greathouse IV, Sep 02 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Oct 19 2010
STATUS
approved