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Search: id:A072236
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| A072236 |
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Numbers of primes between successive primorials. |
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+0
1
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| 1, 2, 7, 36, 297, 2905, 39083, 603698, 11637502, 288086265, 7728273214, 251460107734, 9155428058351
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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The sum of this series is pi(x).
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EXAMPLE
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There are 3 primes less than 6, 7 primes between 6 and 30, and 36 primes between 30 and 210.
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MATHEMATICA
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Table[ PrimePi[ Product[Prime[i], {i, 1, n}]] - PrimePi[ Product[ Prime[i], {i, 1, n - 1}]], {n, 1, 12}]
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CROSSREFS
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Cf. A002110 & A000849.
Sequence in context: A012712 A012363 A012717 this_sequence A007474 A002724 A029990
Adjacent sequences: A072233 A072234 A072235 this_sequence A072237 A072238 A072239
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KEYWORD
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hard,nonn
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AUTHOR
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Stephan Wagler (stephanwagler(AT)aol.com), Jul 05 2002
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EXTENSIONS
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Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 08 2002
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