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A095012 Number of 8k+7 primes (A007522) in range ]2^n,2^(n+1)]. 4
0, 1, 0, 2, 1, 4, 6, 12, 17, 36, 62, 118, 222, 395, 773, 1412, 2699, 5100, 9690, 18384, 35074, 67076, 128446, 246483, 473737, 911126, 1757021, 3390639, 6551367, 12675525, 24545392, 47584301, 92330675 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..33.

A. Karttunen and J. Moyer, C-program for computing the initial terms of this sequence

Index entries for sequences related to occurrences of various subsets of primes in range ]2^n,2^(n+1)]

MATHEMATICA

Module[{nn = 21, s}, s = Select[8 Range[0, 2^nn] + 7, PrimeQ]; Table[Count[s, _?(2^n < # < 2^(n + 1) &)], {n, nn}]] (* Michael De Vlieger, Jul 23 2017 *)

CROSSREFS

a(n) = A095013(n)-A095009(n). Cf. A091129.

Sequence in context: A285637 A205845 A034424 * A192781 A253918 A269415

Adjacent sequences:  A095009 A095010 A095011 * A095013 A095014 A095015

KEYWORD

nonn

AUTHOR

Antti Karttunen and Labos Elemer, Jun 01 2004

STATUS

approved

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Last modified August 14 12:27 EDT 2020. Contains 336480 sequences. (Running on oeis4.)