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 A088557 Least even leg of primitive Pythagorean triangles with odd leg 2n+1. 12
 4, 12, 24, 40, 60, 84, 8, 144, 180, 20, 264, 312, 364, 420, 480, 56, 12, 684, 80, 840, 924, 28, 1104, 1200, 140, 1404, 48, 176, 1740, 1860, 16, 72, 2244, 260, 2520, 2664, 308, 36, 3120, 3280, 3444, 132, 416, 3960, 60, 476, 168, 4704, 20, 5100, 5304, 88, 5724, 5940 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(n) shares identical entries with A046092(n) except for n=(A081934 - 1)/2. LINKS Jean-François Alcover, Table of n, a(n) for n = 1..1000 MATHEMATICA a[n_] := 2k /. Solve[k > 0 && 1 < h < 2k + 2n + 1 && (2k)^2 + (2n + 1)^2 == h^2 && GCD[2k, 2n + 1, h] == 1, {k, h}, Integers][[1]]; a /@ Range[54] (* Jean-François Alcover, Mar 05 2020 *) CROSSREFS Cf. A088558, A096891-A096900. Sequence in context: A081935 A008006 A081937 * A046092 A301059 A008241 Adjacent sequences: A088554 A088555 A088556 * A088558 A088559 A088560 KEYWORD nonn AUTHOR Lekraj Beedassy, Nov 17 2003 EXTENSIONS Corrected and extended by Ray Chandler, Jul 14 2004 STATUS approved

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Last modified February 21 01:50 EST 2024. Contains 370219 sequences. (Running on oeis4.)