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 A095267 Least perimeter common to 2^n primitive arithmetic triangles, i.e., Heronian triangles whose sides are in arithmetic progression. 2
 12, 84, 1092, 20748, 643188, 23797956, 1023312108, 62422038588, 4182276585396, 305306190733908, 24119189067978732, 2339561339593937004, 240974817978175511412, 26266255159621130743908 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS K. S. Brown, Highly Heronian Ellipses FORMULA a(n) = 3*A095288(n) = a(n-1)*A002476(n). - Ray Chandler, Jul 09 2004 EXAMPLE 1092 is the perimeter common to the 2^2=4 arithmetic triangles (183,364,545), (185,364,543), (257,364,471), (303,364,425) having common differences 181, 179, 107, 61 and areas 6006, 10376, 46410, 54054, respectively. (Middle side is the same in all triangles.) CROSSREFS Cf. A086909. Sequence in context: A003209 A155645 A336907 * A118017 A225785 A098206 Adjacent sequences:  A095264 A095265 A095266 * A095268 A095269 A095270 KEYWORD nonn AUTHOR Lekraj Beedassy, Jul 02 2004 EXTENSIONS More terms from Ray Chandler, Jul 09 2004 STATUS approved

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Last modified September 28 04:24 EDT 2021. Contains 347698 sequences. (Running on oeis4.)