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A080451
a(1) = 7, a(n) = smallest (nontrivial) multiple of a(n-1) containing n digits, a(n) not equal to 10*a(n-1).
9
7, 14, 112, 1008, 11088, 121968, 1097712, 12074832, 108673488, 1195408368, 10758675312, 118345428432, 1065108855888, 11716197414768, 105445776732912, 1159903544062032, 10439131896558288, 114830450862141168
OFFSET
1,1
LINKS
MATHEMATICA
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 *)
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Feb 23 2003
EXTENSIONS
More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 06 2003
STATUS
approved