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Search: id:A036458
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| A036458 |
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For all n, if d recursively applied to a[ n ] exactly 6 times then the fixed point of d-iteration is just reached. |
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2
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| 5040, 7920, 8400, 9360, 10080, 10800, 11088, 11340, 11760, 12240, 12600, 12960, 13104, 13200, 13680, 13860, 15600, 15840, 16200, 16380, 16560, 16800, 17136, 17640, 17820, 18000, 18144, 18720, 18900, 19152, 19440, 19800, 20160, 20400
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OFFSET
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1,1
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COMMENT
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Observe that the values giving stationary value in 6 steps are rather large.
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FORMULA
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Nest[ d, a[ n ], 6 ]=2 for all n (and so all a[ n ])
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EXAMPLE
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a[ 1 ]=5040 and the nested d functions are 60,12,6,4,3 and the 6th is 2. a[ 5 ]=10080 and iterating d with 10080 initial value, after 6 iteration the convergence takes place through 72,12,6,3 transients, i.e. 2 is reached in 6th step.
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CROSSREFS
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Cf. A036457.
Sequence in context: A112139 A111030 A068378 this_sequence A090393 A061140 A061122
Adjacent sequences: A036455 A036456 A036457 this_sequence A036459 A036460 A036461
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu)
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