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A080129
Number of primes less than n*10^20.
21
2220819602560918840, 4374267703076959271, 6503696293016202398, 8617821096373621600, 10720710117789005897, 12814731195053369962, 14901434779964228982, 16981914723713251575, 19056983802675654255, 21127269486018731928
OFFSET
1,1
PROG
(PARI) a(n)=primepi(10^20*n) \\ Charles R Greathouse IV, Apr 29 2015
KEYWORD
hard,nonn
AUTHOR
EXTENSIONS
a(7)-a(10) from Robert G. Wilson v, Feb 04 2006
STATUS
approved