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A046087
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Middle member 'b' of the primitive Pythagorean triples (a,b,c) ordered by increasing c, then b.
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23
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4, 12, 15, 24, 21, 35, 40, 45, 60, 56, 63, 55, 77, 84, 80, 72, 99, 91, 112, 117, 105, 143, 144, 140, 132, 120, 165, 180, 153, 176, 168, 195, 156, 187, 171, 220, 221, 208, 209, 255, 247, 264, 260, 252, 231, 240, 285, 224, 273, 312, 308, 253, 323, 288, 299, 272
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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maxHypo = 389; r[b_, c_] := Reduce[0 < a <= b < c && a^2 + b^2 == c^2, a, Integers]; Reap[Do[r0 = r[b, c]; If[r0 =!= False, {a0, b0, c0} = {a, b, c} /. ToRules[r0]; If[GCD[a0, b0, c0] == 1, Print[b0]; Sow[b0]]], {c, 1, maxHypo}, {b, 1, maxHypo}]][[2, 1]] (* Jean-François Alcover, Oct 22 2012 *)
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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