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 A207638 Squares that can be written as a sum of 3 distinct nonzero squares in no more than one way. 2
 49, 81, 121, 169, 196, 289, 324, 484, 676, 784, 1156, 1296, 1936, 2704, 3136, 4624, 5184, 7744, 10816, 12544, 18496, 20736, 30976, 43264, 50176, 73984, 82944, 123904 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA t = Sort[Select[Flatten[Table[x^2 + y^2 + z^2, {x, 400}, {y, x + 1, 400}, {z, y + 1, 400}]], # < 160006 && IntegerQ[Sqrt[#]] &]]; f1[l_] := Module[{t = {}}, Do[If[l[[n]] != l[[n + 1]] && l[[n]] != l[[n - 1]], AppendTo[t, l[[n]]]], {n, Length[l] - 1}]; t]; s1 = Join[{First[t]}, f1[t]] CROSSREFS Sequence in context: A294028 A056938 A267986 * A286095 A106311 A006832 Adjacent sequences:  A207635 A207636 A207637 * A207639 A207640 A207641 KEYWORD nonn AUTHOR Vladimir Joseph Stephan Orlovsky, Feb 19 2012 STATUS approved

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Last modified August 8 19:29 EDT 2020. Contains 336298 sequences. (Running on oeis4.)