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A199986
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Numbers with digital product = 2.
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3
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2, 12, 21, 112, 121, 211, 1112, 1121, 1211, 2111, 11112, 11121, 11211, 12111, 21111, 111112, 111121, 111211, 112111, 121111, 211111, 1111112, 1111121, 1111211, 1112111, 1121111, 1211111, 2111111, 11111112, 11111121, 11111211, 11112111, 11121111, 11211111
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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LINKS
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MAPLE
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f:= proc(d) local b, i;
b:= (10^d-1)/9;
seq(b+10^i, i=0..d-1);
end proc:
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PROG
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(PARI) one(n)=if(n, 10^n\9, "")
(Python)
def athrough(k1s):
return [int("1"*(i-j)+"2"+"1"*j) for i in range(k1s+1) for j in range(i+1)]
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CROSSREFS
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KEYWORD
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nonn,easy,base
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AUTHOR
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STATUS
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approved
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