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A099831 Perimeters of Pythagorean triangles that can be constructed in exactly 2 different ways. 1
60, 84, 90, 132, 144, 210, 264, 270, 288, 300, 312, 330, 390, 408, 432, 440, 450, 456, 462, 468, 510, 520, 546, 552, 570, 576, 588, 612, 616, 680, 684, 690, 700, 728, 760, 770, 800, 810, 816, 828, 870, 910, 912, 918, 920, 952, 1044, 1064, 1100, 1104, 1116 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..51.

Ron Knott, Pythagorean Triples and Online Calculators

Eric Weisstein's World of Mathematics, Pythagorean Triple.

Index entries related to Pythagorean Triples.

EXAMPLE

a(1)=60 = 10+24+26 = 15+20+25; a(2)=84 = 12+35+37 = 21+28+35.

CROSSREFS

Sequence in context: A174292 A085987 A086974 * A138604 A086975 A100659

Adjacent sequences:  A099828 A099829 A099830 * A099832 A099833 A099834

KEYWORD

nonn

AUTHOR

Hugo Pfoertner, Oct 27 2004

STATUS

approved

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Last modified September 26 06:54 EDT 2017. Contains 292502 sequences.