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A071793
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Decimal expansion of the fifth (of 10) decimal selvage number; the n-th digit of a decimal selvage number, x, is equal to the tens digit of n*x.
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5
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4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 9, 4, 8, 3, 8, 3, 8, 3, 8, 3, 8, 3, 8, 3, 8, 3, 8, 3, 8, 3, 8, 3, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 0, 5, 9, 4
(list; constant; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| The selvage number, x = sum{k=1..inf} a(k)/10^k, is a normal number, but it is not known whether or not x is irrational. Is this sequence periodic?
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FORMULA
| a(n) = floor[10*(n*x)] (Mod 10), where x = sum{k=1..inf} a(k)/10^k.
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EXAMPLE
| a(5) = 4 since floor(10*(5*x)) = 4, x=.49494949494949494948383838383838383838372727272727...
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CROSSREFS
| Sequence in context: A068950 A021673 A141653 * A010714 A089090 A204919
Adjacent sequences: A071790 A071791 A071792 * A071794 A071795 A071796
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KEYWORD
| nonn,cons,base,nice
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AUTHOR
| Paul D. Hanna (pauldhanna(AT)juno.com), Jun 06 2002
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