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Search: id:A056011
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| A056011 |
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Unique triangle such that (1) every positive integer occurs exactly once; (2) row n consists of n consecutive numbers; (3) odd-numbered rows are increasing; and (4) even-numbered rows are decreasing. |
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+0
1
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| 1, 3, 2, 4, 5, 6, 10, 9, 8, 7, 11, 12, 13, 14, 15, 21, 20, 19, 18, 17, 16, 22, 23, 24, 25, 26, 27, 28, 36, 35, 34, 33, 32, 31, 30, 29, 37, 38, 39, 40, 41, 42, 43, 44, 45, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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Self-inverse permutation of the natural numbers.
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LINKS
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Index entries for sequences that are permutations of the natural numbers
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EXAMPLE
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1; 3,2; 4,5,6; 10,9,8,7; 11,12,13,14,15; ...
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CROSSREFS
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Sequence in context: A113001 A036812 A039906 this_sequence A117123 A116966 A125060
Adjacent sequences: A056008 A056009 A056010 this_sequence A056012 A056013 A056014
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KEYWORD
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nonn,tabl,nice
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AUTHOR
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Clark Kimberling (ck6(AT)evansville.edu), Aug 01 2000
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