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A072236
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Numbers of primes between successive primorials.
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1
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1, 2, 7, 36, 297, 2905, 39083, 603698, 11637502, 288086265, 7728273214, 251460107734, 9155428058351, 353182833587645, 15035130777416118
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| The sum of this series is pi(x).
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LINKS
| Tomas Oliveira e Silva, Tables of values of pi(x) and of pi2(x) [From Donovan Johnson (donovan.johnson(AT)yahoo.com), Apr 25 2010]
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EXAMPLE
| 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
| Table[ PrimePi[ Product[Prime[i], {i, 1, n}]] - PrimePi[ Product[ Prime[i], {i, 1, n - 1}]], {n, 1, 12}]
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CROSSREFS
| Cf. A002110 & A000849.
Sequence in context: A012712 A012363 A012717 * A007474 A002724 A203900
Adjacent sequences: A072233 A072234 A072235 * A072237 A072238 A072239
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KEYWORD
| hard,nonn
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AUTHOR
| Stephan Wagler (stephanwagler(AT)aol.com), Jul 05 2002
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EXTENSIONS
| Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 08 2002
a(13)-a(14) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Apr 25 2010
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