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Search: id:A118833
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| A118833 |
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a(1) = 1. a(n) = (|a(n-1)-n| +1)th positive integer which doesn't occur earlier in the sequence. |
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+0
2
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| 1, 3, 2, 6, 5, 7, 4, 12, 11, 9, 13, 10, 16, 15, 8, 24, 23, 21, 18, 19, 20, 22, 17, 31, 30, 28, 25, 29, 14, 46, 45, 43, 40, 36, 27, 42, 37, 32, 44, 38, 35, 49, 48, 41, 47, 33, 61, 60, 58, 55, 51, 34, 72, 71, 69, 66, 62, 53, 57, 52, 67, 59, 56, 70, 64, 50, 84, 83, 81, 78, 74, 54
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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This sequence is likely a permutation of the integers.
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EXAMPLE
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The first 8 terms of the sequence are 1,3,2,6,5,7,4,12. |a(8)-9|+1 = 4, so a(9) = the 4th positive integer which doesn't occur earlier in the sequence (i.e. the 4th integer in the sequence 8, 9, 10, 11, 13, 14,..). Therefore a(9) = 11.
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CROSSREFS
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Cf. A118834.
Sequence in context: A132665 A132667 A133729 this_sequence A046877 A067587 A120476
Adjacent sequences: A118830 A118831 A118832 this_sequence A118834 A118835 A118836
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KEYWORD
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easy,nonn
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AUTHOR
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Leroy Quet (qq-quet(AT)mindspring.com), May 01 2006
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EXTENSIONS
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More terms from Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Nov 28 2006
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