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Search: id:A120961
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| A120961 |
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Composite hypotenuses of primitive Pythagorean triangles. |
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+0
1
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| 25, 65, 85, 125, 145, 169, 185, 205, 221, 265, 289, 305, 325, 365, 377, 425, 445, 481, 485, 493, 505, 533, 545, 565, 625, 629, 685, 689, 697, 725, 745, 785, 793, 841, 845, 865, 901, 905, 925, 949, 965, 985, 1025, 1037, 1073, 1105, 1145, 1157, 1165, 1189, 1205
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Composite entries of A008846. Union of A024409 and composite entries of A120960.
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MATHEMATICA
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lst = {}; Do[ If[ GCD[m, n] == 1, a = 2 m*n; b = m^2 - n^2; c = m^2 + n^2; If[ !PrimeQ@c, AppendTo[lst, c]]], {m, 3, 300}, {n, If[ OddQ@m, 2, 1], m - 1, 2}]; Take[ Union@ lst, 51] [From Robert G. Wilson v (rgwv(AT)rgwv.com), May 02 2009]
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CROSSREFS
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Sequence in context: A103645 A061970 A159008 this_sequence A050993 A121387 A039376
Adjacent sequences: A120958 A120959 A120960 this_sequence A120962 A120963 A120964
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KEYWORD
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nonn
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AUTHOR
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Lekraj Beedassy (blekraj(AT)yahoo.com), Jul 19 2006
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EXTENSIONS
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Added the term 485 which satisfies 485^2 = 476^2 + 93^2. - Robert G. Wilson v (rgwv(AT)rgwv.com), May 02 2009
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