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 A010814 Perimeters of integer-sided right triangles. 32
 12, 24, 30, 36, 40, 48, 56, 60, 70, 72, 80, 84, 90, 96, 108, 112, 120, 126, 132, 140, 144, 150, 154, 156, 160, 168, 176, 180, 182, 192, 198, 200, 204, 208, 210, 216, 220, 224, 228, 234, 240, 252, 260, 264, 270, 276, 280, 286, 288, 300, 306, 308, 312, 320, 324 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A number k is in this sequence iff k is a multiple of some term in A024364. LINKS Ray Chandler, Table of n, a(n) for n = 1..10000 (first 1000 terms from Vincenzo Librandi) Ron Knott, Pythagorean Triples and Online Calculators Index entries related to Pythagorean Triples. MAPLE isA010814 := proc(an) local a::integer, b::integer, c::integer ; for c from 1 to floor(an/2) do for a from floor(c/sqrt(2)) to c-1 do if issqr(c^2-a^2) then b := sqrt(c^2-a^2) ; if a+b+c = an then RETURN(true) ; fi ; fi ; od ; od : RETURN(false) ; end : for n from 3 to 400 do if isA010814(n) then printf("%d, ", n) ; fi ; od ; # R. J. Mathar, Jun 08 2006 MATHEMATICA lst={}; Do[Do[If[IntegerQ[c=Sqrt[a^2+b^2]], AppendTo[lst, a+b+c]], {b, a-1, Floor[Sqrt[a]], -1}], {a, 4, 4*5!}]; Take[Union@lst, 100] (* Vladimir Joseph Stephan Orlovsky, Nov 23 2010 *) CROSSREFS Twice A005279. Cf. A024364. Sequence in context: A289484 A027854 A009096 * A334760 A098714 A334758 Adjacent sequences: A010811 A010812 A010813 * A010815 A010816 A010817 KEYWORD nonn,easy AUTHOR Ben Manvel (manvel(AT)lagrange.math.colostate.edu) EXTENSIONS More terms from Ray Chandler, Mar 13 2004 STATUS approved

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Last modified June 9 08:16 EDT 2023. Contains 363168 sequences. (Running on oeis4.)