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Search: id:A082404
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| A082404 |
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Triangle in which n-th row gives trajectory of n under the map x -> x/2 if x is even, x -> x-1 if x is odd, stopping when we reach 1. |
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+0
2
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| 1, 2, 1, 3, 2, 1, 4, 2, 1, 5, 4, 2, 1, 6, 3, 2, 1, 7, 6, 3, 2, 1, 8, 4, 2, 1, 9, 8, 4, 2, 1
(list; graph; listen)
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OFFSET
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2,2
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COMMENT
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If you write down 0 when divide by 2, 1 when subtract 1, the trajectory gives the binary expansion of n.
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EXAMPLE
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1; 2,1; 3,2,1; 4,2,1; 5,4,2,1; 6,3,2,1; ...
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CROSSREFS
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A better version of A080825.
Sequence in context: A083368 A112379 A073932 this_sequence A120885 A057058 A141672
Adjacent sequences: A082401 A082402 A082403 this_sequence A082405 A082406 A082407
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KEYWORD
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easy,nonn,tabf,more
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Apr 14 2003
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