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A118140 Index of A005846(n) in the primes. 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

FORMULA

a(n) = PrimePi(A005846(n)) = A000720( A005846(n)).

MATHEMATICA

a = Table[PrimePi[n^2 + n + 41], {n, 0, 39}]

CROSSREFS

Cf. A005846.

Sequence in context: A132580 A138596 A293831 * A108854 A106007 A048037

Adjacent sequences:  A118137 A118138 A118139 * A118141 A118142 A118143

KEYWORD

nonn

AUTHOR

Roger L. Bagula, May 11 2006

EXTENSIONS

Offset corrected - Assoc. Eds. of the OEIS, Jun 15 2010

STATUS

approved

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Last modified August 10 07:37 EDT 2020. Contains 336368 sequences. (Running on oeis4.)