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Search: id:A132113
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| A132113 |
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Multiply previous term by 8 and reverse. |
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+0
1
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| 1, 8, 46, 863, 4096, 86723, 487396, 8619983, 46895986, 888761573, 4852900117, 63900232883, 460368102115, 296184492863, 4092495749632, 65079956993723, 487949556936025, 28845546953093, 447426573467032, 6526377852149753
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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a(n) = reverse(8 * a(n-1)) where a(1) = 1
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EXAMPLE
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reverse(8 * a(3)) = reverse(8 * reverse(8 * a(2))) = reverse(8 * reverse( 8 * reverse(8 * a(1)))) = reverse(8 * reverse(8 * reverse(8))) = reverse(6 * 46) = 863
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MAPLE
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rev:=proc(n) local nn: nn:=convert(n, base, 10): add(nn[j]*10^(nops(nn)-j), j = 1..nops(nn)) end proc: a[1]:=1: for n from 2 to 20 do a[n]:=rev(8*a[n-1]) end do: seq(a[n], n=1..20); - Definition corrected by Emeric Deutsch (deutsch(AT)duke.poly.edu), Nov 07 2007
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CROSSREFS
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Cf. A045539, A133361.
Sequence in context: A113992 A037070 A141788 this_sequence A085299 A026983 A081279
Adjacent sequences: A132110 A132111 A132112 this_sequence A132114 A132115 A132116
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KEYWORD
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base,nonn
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AUTHOR
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Rachit Agrawal (rachit_agrawal(AT)daiict.ac.in), Oct 31 2007
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EXTENSIONS
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Definition corrected by Emeric Deutsch (deutsch(AT)duke.poly.edu), Nov 07 2007
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