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A089710
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a(1) = 3. For n > 1, a(n) is the least unused number such that the concatenation a(n)a(n-1)...a(2)a(1) is prime.
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16
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3, 1, 6, 9, 4, 20, 13, 29, 19, 2, 7, 18, 12, 41, 36, 30, 72, 25, 27, 8, 28, 42, 47, 114, 85, 38, 16, 117, 177, 24, 11, 66, 34, 53, 37, 264, 48, 126, 96, 87, 39, 261, 99, 65, 124, 419, 21, 147, 55, 321, 240, 62, 40, 69, 92, 60, 49, 287, 289, 393, 227, 745, 84, 149, 58, 54, 141
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OFFSET
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1,1
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COMMENTS
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Is this a rearrangement of the natural numbers?
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LINKS
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Table of n, a(n) for n=1..67.
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EXAMPLE
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3, 13, 613, 9613, 49613, 2049613, ... etc. are primes.
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CROSSREFS
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Cf. A089711.
Sequence in context: A049410 A013610 A008573 * A065918 A020861 A163213
Adjacent sequences: A089707 A089708 A089709 * A089711 A089712 A089713
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 17 2003
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EXTENSIONS
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More terms from Ray Chandler, Nov 21 2003
Edited by Charles R Greathouse IV, Apr 29 2010
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STATUS
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approved
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