OFFSET
1,1
PROG
(PARI) a(n)=if(n>4, prime(n-1), [3, 4, 5, 6][n]) \\ Charles R Greathouse IV, Aug 21 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Reinhard Zumkeller, Feb 23 2008
EXTENSIONS
Corrected by Charles R Greathouse IV, Apr 19 2010
STATUS
approved