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Search: id:A122196
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| A122196 |
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Fractal sequence: count down by 2's from successive integers. |
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+0
7
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| 1, 2, 3, 1, 4, 2, 5, 3, 1, 6, 4, 2, 7, 5, 3, 1, 8, 6, 4, 2, 9, 7, 5, 3, 1, 10, 8, 6, 4, 2, 11, 9, 7, 5, 3, 1, 12, 10, 8, 6, 4, 2, 13, 11, 9, 7, 5, 3, 1, 14, 12, 10, 8, 6, 4, 2, 15, 13, 11, 9, 7, 5, 3, 1, 16, 14, 12, 10, 8, 6, 4, 2, 17, 15, 13, 11, 9, 7, 5, 3, 1, 18, 16, 14, 12, 10, 8, 6, 4, 2, 19, 17
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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First differences of A076644. Fractal - deleting the first occurrence of each integer leaves the original sequence. Also, original sequence plus 1. 1's occur at square indices. New values occur at indices m^2+1 and m^2+m+1. Ordinal transform of A122197.
Row sums = A002620: (1, 2, 4, 6, 9, 12, 16, 20,...). [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Nov 29 2008]
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EXAMPLE
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1, 2, 3,1, 4,2, 5,3,1, 6,4,2, etc.
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CROSSREFS
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Cf. A076644, A122197, A000290, A033638.
A002620 [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Nov 29 2008]
Sequence in context: A083906 A160541 A022446 this_sequence A023117 A023127 A125159
Adjacent sequences: A122193 A122194 A122195 this_sequence A122197 A122198 A122199
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KEYWORD
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easy,nonn
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AUTHOR
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Frank Adams-Watters (FrankTAW(AT)Netscape.net), Aug 25 2006
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