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A053653
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Number of ways to rearrange digits of prime(n)*prime(n+1) to form a prime.
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1
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0, 0, 1, 0, 1, 0, 1, 2, 0, 0, 3, 4, 8, 0, 6, 11, 3, 0, 3, 6, 1, 1, 4, 3, 0, 2, 5, 6, 15, 15, 17, 16, 12, 12, 4, 10, 8, 5, 8, 18, 11, 23, 5, 13, 9, 10, 8, 6, 27, 9, 4, 6, 14, 4, 24, 3, 14, 6, 4, 33, 7, 14, 11, 12, 6, 86, 26, 53, 13, 79, 27
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,8
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EXAMPLE
| a(8)=2 because 19*23=437 and 2 primes, 347 and 743, can be formed from the digits of 437.
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MAPLE
| Leading zeros are not allowed in the rearranged number.
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CROSSREFS
| Cf. A053652, A053736.
Sequence in context: A188429 A188430 A013585 * A064146 A028590 A074644
Adjacent sequences: A053650 A053651 A053652 * A053654 A053655 A053656
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KEYWORD
| easy,nonn,base
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AUTHOR
| Enoch Haga (Enokh(AT)comcast.net), Feb 18 2000
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EXTENSIONS
| Edited by Jens Kruse Andersen (jens.k.a(AT)get2net.dk), Dec 01 2006
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