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A010814 Perimeters of integer-sided right triangles. 10
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 n is in this sequence iff n is a multiple of some term in A024364.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

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.

Sequence in context: A289484 A027854 A009096 * A098714 A108938 A085236

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 September 26 01:25 EDT 2017. Contains 292500 sequences.