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Search: id:A098397
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A098397 Number of primes that are not less than prime(n)-Log2(prime(n)) and not greater than prime(n)+Log2(prime(n)), where Log2=A000523. +0
3
2, 2, 3, 2, 2, 2, 3, 3, 2, 2, 2, 2, 3, 3, 2, 1, 2, 2, 4, 3, 4, 3, 3, 2, 3, 4, 5, 5, 4, 3, 2, 3, 3, 2, 2, 3, 3, 3, 3, 3, 3, 2, 3, 4, 4, 3, 1, 3, 4, 4, 4, 3, 2, 2, 3, 4, 4, 4, 5, 3, 3, 1, 3, 4, 4, 3, 2, 2, 3, 3, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 3, 3, 4, 3, 3, 4, 4, 4, 3, 2, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 4, 4, 4 (list; graph; listen)
OFFSET

1,1

COMMENT

a(n) = A000720(A098389(n)) - A000720(A098390(n)-1);

A098398(n) <= A098396(n) <= a(n) <= A097935(n).

EXAMPLE

a(10) = #{p prime: A098389(10) <= p <= A098390(10)} =

= #{p prime: 25 <= p <= 33} = #{29,31} = 2.

CROSSREFS

Adjacent sequences: A098394 A098395 A098396 this_sequence A098398 A098399 A098400

Sequence in context: A037914 A073813 A104517 this_sequence A082091 A085962 A060244

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 06 2004

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.


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