OFFSET
1,2
COMMENTS
Computed by T. D. Noe, Dec 19 2003.
LINKS
Bernhard Helmes, Distribution of Primes
Eric Weisstein's World of Mathematics, Modular Prime Counting Function
MATHEMATICA
p = Select[Table[8 i + 7, {i, 0, 10^7}], PrimeQ[#] &]; Table[Count[p, x_ /; x < 10^n], {n, 7}] (* Robert Price, May 28 2019 *)
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Dec 19 2003
EXTENSIONS
a(10) from Robert G. Wilson v, Dec 22 2003
a(11)-a(14) from Bernhard Helmes (pi(AT)devalco.de), Apr 21 2010
STATUS
approved