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A080432 Even numbers such that all a(i) + a(j) are distinct. 1
2, 4, 6, 10, 16, 26, 42, 60, 78, 106, 148, 190, 256, 304, 364, 424, 516, 632, 748, 826, 952, 1062, 1092, 1216, 1434, 1596, 1724, 1930, 2120, 2322, 2614, 2772, 2870, 3112, 3444, 3668, 3868, 4116, 4522, 4994, 5398, 5748, 6122, 6394, 6664, 7258, 7424, 7736 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..48.

MAPLE

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

CROSSREFS

Cf. A080430, A080431.

2 * A011185(n).

Sequence in context: A028488 A280341 A227572 * A094985 A128588 A023613

Adjacent sequences:  A080429 A080430 A080431 * A080433 A080434 A080435

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Feb 20 2003

EXTENSIONS

More terms from James A. Sellers, Feb 26 2003

STATUS

approved

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Last modified March 23 12:43 EDT 2019. Contains 321430 sequences. (Running on oeis4.)