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A140391 Pythagorean triangle side lengths triples with two lengths prime. 1
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; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Or: consecutive triples of x=A067755(j), y=A048161(j), z=A067756(j), j>=1.

LINKS

Table of n, a(n) for n=1..49.

EXAMPLE

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

CROSSREFS

Sequence in context: A226654 A124451 A277261 * A241284 A019322 A257301

Adjacent sequences:  A140388 A140389 A140390 * A140392 A140393 A140394

KEYWORD

nonn,less

AUTHOR

Juri-Stepan Gerasimov, Jun 13 2008

EXTENSIONS

Edited and extended by R. J. Mathar, Jun 17 2008

STATUS

approved

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Last modified June 24 08:22 EDT 2017. Contains 288697 sequences.