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Search: id:A120828
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| A120828 |
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Primes with n consecutive digits descending beginning with the digit one. |
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+0
3
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OFFSET
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1,1
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COMMENT
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Digits are in descending order beginning with 1 and after 0 comes 9.
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EXAMPLE
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5 is a term since 10987 is a prime.
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MATHEMATICA
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fQ[n_] := PrimeQ@ FromDigits@ Mod[2-Range@n, 10]; lst = {}; Do[ If[fQ@n, AppendTo[lst, n]; Print@n], {n, 6000}]; lst
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CROSSREFS
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Cf. A120804, A120819 A120829.
Sequence in context: A055786 A001790 A057908 this_sequence A077784 A145640 A086158
Adjacent sequences: A120825 A120826 A120827 this_sequence A120829 A120830 A120831
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KEYWORD
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base,hard,nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 05 2006
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