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Search: id:A165028
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| A165028 |
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Consider the base-4 Kaprekar map x->K(x) described in A165012. Sequence gives the smallest number that belongs to a cycle of length n under repeated iteration of this map, or -1 if there is no cycle of length n |
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+0
8
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OFFSET
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1,2
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COMMENT
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Known values (to 200 base-4 digits):
a(1) = 0 (base 10) = 0 (base 4)
a(2) = 126 (base 10) = 1332 (base 4)
a(3) = 41958 (base 10) = 22033212 (base 4)
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LINKS
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Index entries for the Kaprekar map
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CROSSREFS
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Cf. A165012, A165016, A165017, A165019, A165021, A165023.
In other bases: A153881 (base 2), A165008 (base 3), A165047 (base 5), A165067 (base 6), A165086 (base 7), A165106 (base 8), A165126 (base 9), A151959 (base 10).
Sequence in context: A075919 A121004 A027491 this_sequence A078206 A025037 A051335
Adjacent sequences: A165025 A165026 A165027 this_sequence A165029 A165030 A165031
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KEYWORD
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base,nonn,bref
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AUTHOR
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Joseph Myers (jsm(AT)polyomino.org.uk), Sep 04 2009
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