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A024127
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a(n) = 11^n-1.
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10
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0, 10, 120, 1330, 14640, 161050, 1771560, 19487170, 214358880, 2357947690, 25937424600, 285311670610, 3138428376720, 34522712143930, 379749833583240, 4177248169415650, 45949729863572160, 505447028499293770
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OFFSET
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0,2
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COMMENTS
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In base 11 these are 0, A, AA, AAA, ... - David Rabahy, Dec 12 2016
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LINKS
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FORMULA
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a(n) = Sum_{i=1..n} 10^i*binomial(n,n-i) for n>0, a(0)=0. - Bruno Berselli, Nov 11 2015
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MATHEMATICA
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LinearRecurrence[{12, -11}, {0, 10}, 18] (* Ray Chandler, Aug 26 2015 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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