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Search: id:A110394
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| A110394 |
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a(1) = 1; a(n) = n times (9's complement of a(n-1)). |
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+0
3
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| 1, 16, 249, 3000, 34995, 390024, 4269825, 45841392, 487427463, 5125725360, 53617021029, 556595747640, 5764255280667, 59300426070648, 610493608940265, 6232102256955744, 64054261631752335, 647023290628457952
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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a(1)=1; a(n)=n*[99...9 - a(n-1)] for n>1 (99...9 and a[n-1] have the same number of digits). - Emeric Deutsch (deutsch(AT)duke.poly.edu), Jul 31 2005
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EXAMPLE
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a(4) = 4 times 9's complement of a(3) = 4*(999-249) = 3000.
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MAPLE
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s:=proc(m) nops(convert(m, base, 10)) end: a[1]:=1: for n from 2 to 21 do a[n]:=n*(10^s(a[n-1])-1-a[n-1]) od: seq(a[n], n=1..21); (Deutsch)
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CROSSREFS
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Adjacent sequences: A110391 A110392 A110393 this_sequence A110395 A110396 A110397
Sequence in context: A119933 A008788 A138460 this_sequence A077412 A135554 A017570
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KEYWORD
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base,easy,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 29 2005
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Jul 31 2005
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