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A037038 Number of primes between n and 4n+1. +0
1
3, 4, 5, 5, 6, 6, 7, 7, 8, 9, 10, 10, 11, 10, 12, 12, 13, 14, 14, 14, 15, 16, 16, 16, 17, 18, 20, 21, 21, 20, 20, 20, 21, 22, 23, 23, 24, 24, 25, 25, 26, 26, 27, 26, 28, 28, 28, 29, 30, 31, 31, 31, 32, 31, 31, 32, 34, 35, 35, 36, 36, 35, 36, 37, 37, 38, 39, 39, 40, 41, 42, 41 (list; graph; listen)
OFFSET

1,1

EXAMPLE

a(5)=6 because between 5 and 21 there are 6 primes.

CROSSREFS

Cf. A014085.

Adjacent sequences: A037035 A037036 A037037 this_sequence A037039 A037040 A037041

Sequence in context: A130234 A108852 A119476 this_sequence A106501 A065305 A009070

KEYWORD

nonn

AUTHOR

Felice Russo (felice.russo(AT)katamail.com)

EXTENSIONS

More terms from Erich Friedman (erich.friedman(AT)stetson.edu)

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.


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