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A111674
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a(1) = 1; for n>1, a(n) = least multiple of a(n-1) such that the termwise concatenation of a(n), a(n-1),...a(2), a(1) is prime.
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2
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1, 3, 3, 15, 75, 525, 7875, 126000, 2520000, 30240000, 151200000, 5594400000, 341258400000, 21840537600000, 1310432256000000, 23587780608000000, 1533205739520000000, 222314832230400000000, 20452964565196800000000
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OFFSET
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1,2
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LINKS
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Diana Mecum, Table of n, a(n) for n = 1..41
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EXAMPLE
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31,331,15331,7515331, ... are all primes.
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CROSSREFS
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Cf. A111675.
Sequence in context: A143257 A089403 A239600 * A222505 A292356 A209020
Adjacent sequences: A111671 A111672 A111673 * A111675 A111676 A111677
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy, Aug 15 2005
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EXTENSIONS
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More terms from Diana L. Mecum, Jun 26 2007
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STATUS
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approved
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