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A080451
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a(1) = 7, a(n) = smallest (nontrivial) multiple of a(n-1) containing n digits, a(n) not equal to 10*a(n-1).
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9
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7, 14, 112, 1008, 11088, 121968, 1097712, 12074832, 108673488, 1195408368, 10758675312, 118345428432, 1065108855888, 11716197414768, 105445776732912, 1159903544062032, 10439131896558288, 114830450862141168
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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nxt[n_]:=Module[{k=2, len=IntegerLength[n]+1}, While[IntegerLength[ k*n]<len || Divisible[k*n, 10], k++]; k*n] (* Harvey P. Dale, Jan 20 2015 *)
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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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EXTENSIONS
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More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 06 2003
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STATUS
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approved
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