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Search: id:A074855
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| A074855 |
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Primes p such that all p-t for p/2 < t < p are composite, where t is a triangular number. |
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+0
1
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| 2, 3, 7, 19, 29, 37, 61, 211, 521, 613, 1579, 2131, 2467, 2551, 3331
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Next term, if it exists, is greater than 15900000. (Is this sequence finite?) - Ryan Propper (rpropper(AT)stanford.edu), May 20 2006
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EXAMPLE
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29 is in the sequence because the triangular numbers between 14 and 29 are 15, 21, 28 and 29-15 = 14, 29-21 = 8, 29-28 = 1 are all composite.
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CROSSREFS
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Sequence in context: A078373 A038878 A040112 this_sequence A038935 A073640 A005382
Adjacent sequences: A074852 A074853 A074854 this_sequence A074856 A074857 A074858
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KEYWORD
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more,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Sep 11 2002
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