OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
Table[PrimePi[NextPrime[9*Prime[n], -1]], {n, 60}] (* Harvey P. Dale, Jan 10 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Henry Bottomley, Nov 13 2000
STATUS
approved