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A135409
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Sum of all n-digit Keith numbers.
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0
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0, 244, 939, 38842, 399158, 3185054, 8997888, 89003533, 380705305, 0, 120958456566, 909738914355, 10691161155707, 215413743487843, 1146359095715014, 11741086634604569, 186260344930883645, 586697640742217928, 22434377949474656108, 86030233471862779595
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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There are no 1-digit and 10-digit Keith numbers.
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LINKS
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_Jason Earls_ and Eric Weisstein's World of Mathematics, Keith Number.
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EXAMPLE
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Sum of all 2-digit Keith numbers is 244.
Sum of all 3-digit Keith numbers is 939.
Sum of all 4-digit Keith numbers is 38842.
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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