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A048198
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Number of primes between successive n's, where n mod 10 = 5.
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2
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2, 3, 3, 2, 3, 2, 2, 3, 2, 1, 3, 3, 0, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 3, 2, 1, 2, 2, 3, 1, 0, 3, 1, 1, 1, 3, 1, 2, 2, 1, 2, 1, 2, 2, 2, 1, 3, 1, 1, 2, 2, 1, 2, 0, 1, 1, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 1, 1, 1, 1, 2, 2, 1, 2, 2, 0, 1, 1, 2, 2, 2, 1, 1, 3, 0, 3, 1, 0, 2, 1, 1, 2, 2, 0, 2, 2, 1, 1, 2, 2, 2, 1
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| A way to visualize the distribution of primes without the clutter of the numbers themselves. Consecutive 0's indicate stretches where there are no primes. Other patterns become obvious, as a string of 2's or 1's.
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FORMULA
| Starting at 0, count primes between 0-5, 5-15, 15-25, etc.
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EXAMPLE
| Between n's 115 and 125 there are no primes, indicated by the entry 0.
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CROSSREFS
| Cf. A048199.
Sequence in context: A030423 A130631 A130633 * A096006 A131294 A102313
Adjacent sequences: A048195 A048196 A048197 * A048199 A048200 A048201
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KEYWORD
| easy,nonn
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AUTHOR
| Enoch Haga (Enokh(AT)comcast.net)
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