OFFSET
1,7
LINKS
FUNG Cheok Yin, Table of n, a(n) for n = 1..10000
MATHEMATICA
Table[Count[Range[5n, 6n], _?PrimeQ], {n, 80}] (* Harvey P. Dale, Sep 07 2017 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
FUNG Cheok Yin, Jul 07 2017
STATUS
approved