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Search: id:A033627
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| A033627 |
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0-additive sequence: not the sum of any previous pair. |
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+0
18
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| 1, 2, 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43, 46, 49, 52, 55, 58, 61, 64, 67, 70, 73, 76, 79, 82, 85, 88, 91, 94, 97, 100, 103, 106, 109, 112, 115, 118, 121, 124, 127, 130, 133, 136, 139, 142, 145, 148, 151, 154, 157, 160, 163, 166, 169, 172, 175
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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R. K. Guy, Unsolved Problems in Number Theory, C4
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LINKS
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Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
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FORMULA
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2 together with numbers of form 3k+1.
Equals binomial transform of [1, 1, 1, 0, -1, 2, -3, 4, -5, 6, -7,...]. Equals sum of antidiagonal terms of the following arithmetic array: 1, 1, 1, 1, 1,... 1, 2, 3, 4, 5,... 1, 3, 5, 7, 9,... - Gary W. Adamson (qntmpkt(AT)yahoo.com), May 10 2008
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CROSSREFS
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Cf. A002858.
Sequence in context: A080137 A102933 A122019 this_sequence A066512 A135678 A001195
Adjacent sequences: A033624 A033625 A033626 this_sequence A033628 A033629 A033630
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KEYWORD
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nonn
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AUTHOR
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Jud McCranie (j.mccranie(AT)comcast.net)
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