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A080432 Even numbers such that all a(i) + a(j) are distinct. 1

%I

%S 2,4,6,10,16,26,42,60,78,106,148,190,256,304,364,424,516,632,748,826,

%T 952,1062,1092,1216,1434,1596,1724,1930,2120,2322,2614,2772,2870,3112,

%U 3444,3668,3868,4116,4522,4994,5398,5748,6122,6394,6664,7258,7424,7736

%N Even numbers such that all a(i) + a(j) are distinct.

%p sumset := {6}: keepA := array(1..10000): for m from 1 to 10000 do keepA[m] := 0 od: keepA[2] := 2: keepA[4] := 4: for n from 6 to 10000 by 2 do mytest := 0: for j from 2 to n-2 by 2 do if keepA[j]>0 then if member(keepA[j]+n, sumset) then mytest := 1; break; fi: fi: od: if mytest=0 then keepA[n] := n; for j from 2 to n-2 by 2 do sumset := sumset union {keepA[j]+n} od: fi: od: for i from 2 to 10000 by 2 do if keepA[i]>0 then printf(`%d,`, keepA[i]) fi: od: # _James A. Sellers_, Feb 26 2003

%Y Cf. A080430, A080431.

%Y 2 * A011185(n).

%K nonn

%O 1,1

%A _Amarnath Murthy_, Feb 20 2003

%E More terms from _James A. Sellers_, Feb 26 2003

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Last modified August 9 13:57 EDT 2020. Contains 336323 sequences. (Running on oeis4.)