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Search: id:A086580
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| A086580 |
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a(n) = k where R(k+9)=9. |
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+0
8
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| 0, 81, 891, 8991, 89991, 899991, 8999991, 89999991, 899999991, 8999999991, 89999999991, 899999999991, 8999999999991, 89999999999991, 899999999999991, 8999999999999991, 89999999999999991, 899999999999999991
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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a(n) = 9*9*A002275(n) = 9*A002283(n) R(a(n))=A086573(n) One of family of sequences of form a(n)=k, where R(k+m)=m, m=1 to 9; m=1: A002283, m=2: A086573, m=3: A086574, m=4: A086575, m=5: A086576, m=6: A086577, m=7: A086578, m=8: A086579, m=9: A086580.
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FORMULA
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a(n) = 9*(10^n-1)
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CROSSREFS
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Sequence in context: A066431 A045792 A076749 this_sequence A124113 A016768 A059977
Adjacent sequences: A086577 A086578 A086579 this_sequence A086581 A086582 A086583
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KEYWORD
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nonn
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AUTHOR
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Ray Chandler (rayjchandler(AT)sbcglobal.net), Jul 22 2003
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