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6, 10, 12, 14, 18, 20, 22, 24, 26, 28, 30, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 130, 132, 134, 136, 138, 140
(list;
graph;
refs;
listen;
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text;
internal format)
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OFFSET
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1,1
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COMMENTS
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Numbers which can be expressed as a sum of a set of positive consecutive even numbers: sum_{i=m..m+k} A005843(i), m>=1, k>=1.
Differs from A054741, which contains 105 for example.
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LINKS
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Table of n, a(n) for n=1..63.
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EXAMPLE
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6=2+4. 10=4+6. 12=2+4+6. 14=6+8. 18=4+6+8. 20=2+4+6+8. 22=10+12. 24=6+8+10,
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MATHEMATICA
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z=200; lst={}; Do[c=a; Do[c+=b; If[c<=2*z, AppendTo[lst, c]], {b, a-2, 1, -2}], {a, 2, z, 2}]; Union@lst
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CROSSREFS
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Cf. A000217, A054741
Sequence in context: A069209 A060702 A054741 * A176552 A176587 A174164
Adjacent sequences: A177709 A177710 A177711 * A177713 A177714 A177715
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KEYWORD
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nonn,easy
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AUTHOR
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Vladimir Joseph Stephan Orlovsky, May 11 2010
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EXTENSIONS
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Definition moved into a comment by R. J. Mathar, Aug 15 2010
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STATUS
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approved
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