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Search: id:A086573
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| A086573 |
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a(n) = k where R(k+2)=2. |
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+0
8
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| 0, 18, 198, 1998, 19998, 199998, 1999998, 19999998, 199999998, 1999999998, 19999999998, 199999999998, 1999999999998, 19999999999998, 199999999999998, 1999999999999998, 19999999999999998, 199999999999999998
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OFFSET
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0,2
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COMMENT
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a(n) = 2*9*A002275(n) = 2*A002283(n) R(a(n))=A086580(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) = 2*(10^n-1)
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CROSSREFS
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Cf. A083812.
Sequence in context: A073397 A020920 A083812 this_sequence A097515 A026881 A028025
Adjacent sequences: A086570 A086571 A086572 this_sequence A086574 A086575 A086576
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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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