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Search: id:A119474
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| A119474 |
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a(2^m + k) = a(k)th integer among those positive integers not occurring earlier in the sequence, where m >= 0, 1 <= k<= 2^m. a(1) = 1. |
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+0
2
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| 1, 2, 3, 5, 4, 7, 9, 12, 6, 10, 13, 16, 15, 20, 23, 27, 8, 14, 18, 22, 21, 28, 31, 35, 26, 34, 39, 43, 42, 49, 53, 58, 11, 19, 25, 32, 30, 38, 44, 48, 37, 47, 54, 59, 57, 65, 69, 74, 45, 60, 66, 72, 71, 81, 85, 90, 79, 91, 97, 102, 101, 110, 115, 121, 17, 29, 36, 46, 41, 55, 62
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OFFSET
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1,2
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COMMENT
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Sequence is a permutation of the positive integers.
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EXAMPLE
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8 = 2^2 +4. So since k = 4, we want the a(4)th = 5th positive integer from the sequence 6,8,10,11,12,13,..., ie from the sequence of positive integers not occurring among the first 7 terms of {a(k)}. So a(8) = 12.
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CROSSREFS
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Cf. A119475.
Sequence in context: A081994 A090252 A140140 this_sequence A029654 A114461 A065578
Adjacent sequences: A119471 A119472 A119473 this_sequence A119475 A119476 A119477
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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 22 2006
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EXTENSIONS
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More terms from Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), Jul 04 2006
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