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 A009004 Ordered short legs of Pythagorean triangles. 20
 3, 5, 6, 7, 8, 9, 9, 10, 11, 12, 12, 13, 14, 15, 15, 15, 16, 16, 17, 18, 18, 19, 20, 20, 20, 21, 21, 21, 22, 23, 24, 24, 24, 24, 25, 25, 26, 27, 27, 27, 28, 28, 28, 29, 30, 30, 30, 31, 32, 32, 32, 33, 33, 33, 33, 34, 35, 35, 35, 36, 36, 36, 36, 36, 37, 38, 39, 39, 39, 39, 40, 40, 40, 40 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..5000 Robert Recorde, The Whetstone of Witte, whiche is the seconde parte of Arithmeteke: containing the extraction of rootes; the cossike practise, with the rule of equation; and the workes of Surde Nombers, London, 1557. See p. 57. MATHEMATICA maxLeg = 40; r[a_] := a /. {ToRules[ Reduce[a <= b < c && a^2 + b^2 == c^2, {b, c}, Integers]]}; Flatten[r /@ Complement[ Range[maxLeg], {1, 2, 4}]] (* Jean-François Alcover, Jun 13 2012 *) CROSSREFS Sequence in context: A079058 A036496 A196112 * A005527 A285173 A009005 Adjacent sequences:  A009001 A009002 A009003 * A009005 A009006 A009007 KEYWORD nonn AUTHOR STATUS approved

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Last modified April 19 01:30 EDT 2021. Contains 343099 sequences. (Running on oeis4.)