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A044972
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Numbers whose base-3 representation contains exactly one 0 and two 1's.
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2
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10, 12, 32, 34, 38, 42, 46, 48, 58, 64, 66, 98, 104, 106, 116, 128, 132, 140, 142, 146, 150, 154, 156, 176, 178, 184, 194, 196, 200, 204, 208, 210, 220, 226, 228, 296, 314, 320, 322, 350, 386, 398, 402, 422, 428, 430, 440, 452
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graph;
refs;
listen;
history;
text;
internal format)
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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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Select[Range[500], DigitCount[#, 3, 0]==1&&DigitCount[#, 3, 1]==2&] (* Harvey P. Dale, Aug 19 2019 *)
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PROG
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(PARI) is(n)=my(d=digits(n, 3), fr=vector(3)); for(i=1, #d, fr[d[i]+1]++); fr[1]==1&&fr[2]==2 \\ David A. Corneth, Aug 19 2019
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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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