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Search: id:A023989
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| A023989 |
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Look and Say sequence: describe the previous term! (method C - initial term is 2). |
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3
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| 2, 12, 1112, 3112, 211213, 312213, 212223, 114213, 31121314, 41122314, 31221324, 21322314, 21322314, 21322314, 21322314, 21322314, 21322314, 21322314, 21322314, 21322314, 21322314, 21322314, 21322314, 21322314, 21322314, 21322314, 21322314
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Method C = 'frequency' followed by 'digit'-indication with digits in increasing order.
Converges to 21322314 at the eleventh term. Depending on the initial value, the sequence may converge to a cycle of 2 or more values, for example : 123456, 111213141516, 711213141516, 611213141516, 611213141526, 512213141526, 413213142516, 412223241516, 314213241516, 412223241516, 314213241516, 412223241516
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EXAMPLE
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a(1) = 12, so a(2) = 1112 because 12 contains a digit 1 and a digit 2; a(3) = 3112 because 1112 contains three digits 1 and a digit 2
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CROSSREFS
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Cf. A005150, A022481.
Sequence in context: A057120 A112512 A006751 this_sequence A001389 A022914 A138486
Adjacent sequences: A023986 A023987 A023988 this_sequence A023990 A023991 A023992
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KEYWORD
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nonn,base
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AUTHOR
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Artemario Tadeu Medeiros da Silva (artemario(AT)uol.com.br), Mar 19 2002
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