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A133361
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Multiply by 9 and reverse.
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8
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1, 9, 18, 261, 9432, 88848, 236997, 3792312, 80803143, 782822727, 3454045407, 36680468013, 711212421033, 7929871190046, 41401704886317, 358679343516273, 7546461904118223, 70046073175181976, 487736675856414036, 4236277072800369834, 60582330255639462183
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OFFSET
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1,2
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LINKS
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FORMULA
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a(n) = reverse(9*a(n-1)) where a(1) = 1.
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MAPLE
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a:= proc(n) option remember; `if`(n=1, 1,
(s-> parse(cat(s[-i]$i=1..length(s))))(""||(9*a(n-1))))
end:
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MATHEMATICA
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a[n_] := a[n] = If[n==1, 1, IntegerReverse[9a[n-1]]];
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CROSSREFS
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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 26 2007
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EXTENSIONS
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STATUS
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approved
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