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Search: id:A140391
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| A140391 |
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Pythagorean triangle side lengths triples with two lengths prime. |
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+0
2
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| 4, 3, 5, 12, 5, 13, 60, 11, 61, 180, 19, 181, 420, 29, 421, 1740, 59, 1741, 1860, 61, 1861, 2520, 71, 2521, 3120, 79, 3121, 5100, 101, 5101, 8580, 131, 8581, 9660, 139, 9661, 16380, 181, 16381, 19800, 199, 19801, 36720, 271, 36721, 60900, 349, 60901, 71820
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Or: consecutive triples of x=A067755(j), y=A048161(j), z=A067756(j), j>=1.
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EXAMPLE
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Contains (x,y,z) = (4,3,5) with 4^2+3^2=5^2 and 3 and 5 prime, then (12,5,13) with 12^5+5^2=13^2 and 5 and 13 prime, then (60,11,61) with 60^2+11^2=61^2 etc. x^2+y^2=z^2
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CROSSREFS
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Sequence in context: A010475 A033546 A124451 this_sequence A019322 A016503 A010653
Adjacent sequences: A140388 A140389 A140390 this_sequence A140392 A140393 A140394
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KEYWORD
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nonn,less
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AUTHOR
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Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jun 13 2008
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EXTENSIONS
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Edited and extended by R. J. Mathar, Jun 17 2008
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