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A088057
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a(1)= 7, a(n) = least prime obtained by prefixing the digits of a multiple of n to a(n-1).
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1
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7, 47, 347, 12347, 5012347, 425012347, 7425012347, 1447425012347, 1891447425012347, 201891447425012347, 330201891447425012347, 36330201891447425012347, 24736330201891447425012347
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OFFSET
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1,1
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COMMENTS
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Digits of a(n) can be partitioned from (least siginifacnt one) right to left into multiples of 1 to n. a(5) = 5012347 ===> 50, 12, 3, 4, 7.
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LINKS
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Table of n, a(n) for n=1..13.
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EXAMPLE
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a(3) = 347 and a(4) = 12347 is obtained by prefixing 12 to 347.
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CROSSREFS
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Cf. A088056.
Sequence in context: A104092 A024187 A001711 * A108434 A093173 A218761
Adjacent sequences: A088054 A088055 A088056 * A088058 A088059 A088060
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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), Sep 21 2003
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EXTENSIONS
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More terms from Sam Alexander (amnalexander(AT)yahoo.com), Feb 27 2004
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STATUS
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approved
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