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A087345
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Smallest prime which is a concatenation of n successive triangular numbers, or 0 if no such number exists.
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1
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3, 13, 210231253, 171190210231, 36101521, 136101521, 1596165317111770183018911953, 105120136153171190210231, 0, 17020172051739117578177661795518145183361852818721
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OFFSET
| 1,1
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COMMENTS
| a(9k) = 0 because the concatenation of 9k successive triangular numbers is always divisible by 3. - David Wasserman (wasserma(AT)spawar.navy.mil), May 10 2005
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EXAMPLE
| a(3)=210231253 because 210231253 is the smallest prime formed by concatenation of 3 consecutive triangular numbers i.e. 210,231 and 253.
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CROSSREFS
| Cf. A087344.
Sequence in context: A112856 A007523 A092830 * A048756 A174211 A157323
Adjacent sequences: A087342 A087343 A087344 * A087346 A087347 A087348
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 06 2003
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EXTENSIONS
| Corrected and extended by Shyam Sunder Gupta (guptass(AT)rediffmail.com), Apr 25 2005 and David Wasserman (wasserma(AT)spawar.navy.mil), May 10 2005
Edited by N. J. A. Sloane, Sep 02 2010
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