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A147830
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Minimum number k for which the digital sum of k*n is 10n.
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2
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0, 19, 199, 1333, 17497, 199999, 1333333, 12842857, 374999986, 1111111111, 199999999999
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OFFSET
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0,2
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LINKS
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Table of n, a(n) for n=0..10.
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MAPLE
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P:=proc(i) local j, k, n, ok, w; for n from 0 by 1 to i do j:=-1; ok:=1; while ok=1 do j:=j+1; w:=0; k:=n*j; while k>0 do w:=w+k-(trunc(k/10)*10); k:=trunc(k/10); od; if w=10*n then ok:=0; print(j); fi; od; od; end: P(100);
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CROSSREFS
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Cf. A147822-A147829, A147831.
Sequence in context: A058370 A164890 A066007 * A135162 A185687 A067272
Adjacent sequences: A147827 A147828 A147829 * A147831 A147832 A147833
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KEYWORD
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easy,nonn,base
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AUTHOR
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Paolo P. Lava and Giorgio Balzarotti, Nov 14 2008
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EXTENSIONS
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Edited by Charles R Greathouse IV, Nov 01 2009
a(6)-a(10) from Donovan Johnson, Sep 16 2012
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STATUS
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approved
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