A334614 a(n) = pi(prime(n) - n) + n, where pi is the prime counting function.
1, 2, 4, 6, 8, 10, 11, 13, 15, 18, 19, 21, 22, 24, 26, 28, 30, 32, 34, 35, 36, 38, 40, 42, 45, 47, 48, 50, 51, 53, 55, 57, 60, 61, 65, 66, 67, 68, 70, 72, 74, 76, 77, 79, 81, 82, 85, 88, 89, 91, 93, 94, 95, 99, 101, 102, 104, 105, 106, 107, 108, 112, 116, 117
Offset: 1
Keywords
Links
Programs
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Mathematica
Table[PrimePi[Prime[n] - n] + n, {n, 1, 64}] (* Amiram Eldar, Sep 09 2020 *) -
PARI
a(n) = n + primepi(prime(n) - n); \\ Michel Marcus, Sep 09 2020
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Python
from sympy import prime, primepi for n in range(1, 100001): a_n = primepi(prime(n) - n) + n print(a_n)
Formula
a(n) = A065328(n) + n. - Michel Marcus, Sep 12 2020
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