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 A192533 Monotonic ordering of set S generated by these rules: if x and y are in S then x^2+y^2-xy is in S, and 2 is in S. 3
 2, 4, 12, 16, 112, 124, 144, 208, 228, 256, 11008, 11344, 12112, 12324, 12544, 13648, 14032, 14896, 15132, 15376, 17152, 18256, 18688, 19152, 20176, 20452, 20736, 32512, 32848, 34048, 38992, 39088, 39888, 40192, 40912, 42448, 42852, 43264 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS See A192476. LINKS MATHEMATICA start = {2}; f[x_, y_] := x^2 + y^2 - x*y b[x_] := Block[{w = x}, Select[Union[ Flatten[AppendTo[w, Table[f[w[[i]], w[[j]]], {i, 1, Length[w]}, {j, 1, i}]]]], # < 80000 &]]; t = FixedPoint[b, start] (* A192533 *) t/2 (* A192534 *) CROSSREFS Cf. A192476, A192534. Sequence in context: A074646 A097001 A233191 * A085931 A125885 A067929 Adjacent sequences: A192530 A192531 A192532 * A192534 A192535 A192536 KEYWORD nonn AUTHOR Clark Kimberling, Jul 04 2011 STATUS approved

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Last modified December 8 05:37 EST 2022. Contains 358672 sequences. (Running on oeis4.)