2,1

Table of n, a(n) for n=2..79.

C. K. Caldwell, How Many Primes Are There?

a(10000) = floor[104729 - 92103.403 - 22203.268 + 10000] = floor[422.328] = 422.

(PARI) vector(100, n, floor(prime(n+1) - (n+1)*log(n+1) - (n+1)*log(log(n+1))+n+1) \\ Derek Orr, Oct 27 2014

Cf. A000040, A059111.

Sequence in context: A309767 A199500 A164838 * A111731 A134992 A073260

Adjacent sequences: A059109 A059110 A059111 * A059113 A059114 A059115

nonn,easy

Henry Bottomley, Jan 04 2001

approved