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A118140
Index of A005846(n) in the primes.
1
13, 14, 15, 16, 18, 20, 23, 25, 30, 32, 36, 40, 45, 48, 54, 60, 65, 69, 76, 82, 89, 96, 101, 108, 116, 125, 132, 139, 147, 156, 164, 174, 184, 192, 202, 212, 220, 229, 241, 252, 283, 295, 318, 328, 342, 356, 377, 392, 407, 420, 432, 445, 472, 485, 501, 517, 531
OFFSET
1,1
LINKS
FORMULA
a(n) = PrimePi(A005846(n)) = A000720(A005846(n)).
MATHEMATICA
a = Table[PrimePi[n^2 + n + 41], {n, 0, 39}] (* correct only up to 39 *)
PrimePi[Select[Table[n^2 + n + 41, {n, 0, 100}], PrimeQ]] (* Amiram Eldar, Sep 06 2024 *)
CROSSREFS
Sequence in context: A132580 A138596 A293831 * A108854 A106007 A048037
KEYWORD
nonn
AUTHOR
Roger L. Bagula, May 11 2006
EXTENSIONS
Offset corrected by Assoc. Eds. of the OEIS, Jun 15 2010
STATUS
approved