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A095058
Number of primes with a single 0-bit (A095078) in range ]2^n,2^(n+1)].
6
0, 1, 2, 2, 3, 0, 4, 4, 3, 1, 5, 1, 4, 0, 3, 2, 8, 1, 11, 4, 5, 0, 7, 1, 2, 0, 1, 5, 4, 0, 7, 5, 1, 1, 9, 0, 6, 0, 7, 1, 6, 0, 4, 7, 2, 1, 10, 3, 3, 1, 2, 1, 6, 0, 4, 3, 0, 1, 8, 3, 3, 0, 3, 1, 8, 1, 2, 2, 3, 0, 9, 1, 5, 2, 5, 8, 3, 0, 10, 3, 0, 2, 4, 4, 6, 1
OFFSET
1,3
COMMENTS
For large n, the average value of a(n) is about 4. See A138290 for the n such that a(n)=0. - T. D. Noe, Mar 14 2008
PROG
(PARI) a(n) = sum(k=2^n+1, 2^(n+1), isprime(k) && (#select(x->x==0, binary(k))==1)); \\ Michel Marcus, Sep 11 2015
CROSSREFS
Cf. A095018.
Sequence in context: A257989 A095201 A272143 * A137345 A060755 A104594
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jun 01 2004
STATUS
approved