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Search: id:A033990
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| A033990 |
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Write 0,1,2,... in clockwise spiral, writing each digit in separate square; sequence gives numbers on negative y axis. |
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+0
14
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| 0, 1, 1, 8, 3, 7, 6, 2, 1, 5, 1, 1, 6, 2, 2, 1, 3, 4, 0, 4, 5, 3, 6, 7, 0, 8, 9, 1, 4, 6, 1, 2, 7, 1, 1, 4, 4, 8, 1, 7, 4, 7, 2, 0, 8, 8, 2, 4, 4, 1, 2, 8, 4, 6, 3, 2, 7, 3, 3, 7, 3, 2, 4, 1, 2, 3, 4, 7, 5, 6, 5, 2, 0, 1, 5, 8, 9, 8, 6, 4, 1, 7, 6, 1, 7, 8, 7, 7, 5, 1, 8, 4, 7, 6, 9, 2, 2, 3, 9, 0, 1, 0, 1, 6, 8
(list; graph; listen)
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OFFSET
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0,4
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COMMENT
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Consider array of digits 0_(1)23456789(1)0111213141516171(8)1920212223....; in this array add to n-th pointer 8.n+1 to get next pointer. E.g. n=1 so n+(8.1+1)=10 -> n=10 so n+(8.2+1)=27 -> n=27 so ... etc. - comment from Patrick De Geest.
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EXAMPLE
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131416...
245652...
130717...
121862...
101918...
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CROSSREFS
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Sequences from spirals: A001107, A002939, A007742, A033951, A033952, A033953, A033954, A033989, A033990, A033991, A002943, A033996, A033988.
Sequence in context: A010522 A132035 A131654 this_sequence A099284 A061444 A011214
Adjacent sequences: A033987 A033988 A033989 this_sequence A033991 A033992 A033993
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KEYWORD
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nonn,easy,nice
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AUTHOR
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njas
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EXTENSIONS
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More terms from Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 1999.
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