OFFSET
1,1
LINKS
Hiroaki Yamanouchi, Table of n, a(n) for n = 1..20
FORMULA
MATHEMATICA
s = 0; k = 1; Do[ While <= 10^n, s = s + PrimePi[k]; k++ ]; Print[s], {n, 1, 8}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Jul 20 2002
EXTENSIONS
a(9)-a(10) from Donovan Johnson, Dec 15 2009
a(11)-a(12) from Donovan Johnson, Mar 19 2011
a(13)-a(14) from Hiroaki Yamanouchi, Jul 06 2014
STATUS
approved