OFFSET
1,2
COMMENTS
Allowing 2-point safeties, the only impossible score is 1, see A087156. (With 1-point safeties all scores are possible.) - Charles R Greathouse IV, Jun 10 2015
LINKS
FORMULA
All combinations of sums of multiples of 3, 6, and 7.
PROG
(PARI) a(n)=if(n<7, [0, 3, 6, 7, 9, 10][n], n+5) \\ Charles R Greathouse IV, Sep 02 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Dan Brown (ddbhockey(AT)hotmail.com), Feb 26 2009
EXTENSIONS
Edited by N. J. A. Sloane, Mar 08 2009
STATUS
approved