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URL: https://oeis.org/A091162

⇱ A091162 - OEIS

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A091162

Number of primes of the form 12k + 5 less than 10^n.

4

1, 6, 44, 309, 2409, 19611, 166169, 1440483, 12712625, 113763849

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

MATHEMATICA

Table[Total[Table[If[IntegerQ[(n-5)/12], 1, 0], {n, Prime[Range[ PrimePi[ 10^k]]]}]], {k, 10}] (* Harvey P. Dale, Oct 27 2019 *)

CROSSREFS

Cf. A091161 + A091162 + A091163 + A091164 +2 (for 2 & 3) = A006880.

Sequence in context: A309418 A203601 A380196 * A156002 A091163 A189800

Adjacent sequences: A091159 A091160 A091161 * A091163 A091164 A091165

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Jan 12 2004

STATUS

approved