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A039170
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Numbers whose base-11 representation has the same number of 1's and 7's.
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1
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0, 2, 3, 4, 5, 6, 8, 9, 10, 18, 22, 24, 25, 26, 27, 28, 30, 31, 32, 33, 35, 36, 37, 38, 39, 41, 42, 43, 44, 46, 47, 48, 49, 50, 52, 53, 54, 55, 57, 58, 59, 60, 61, 63, 64, 65, 66, 68, 69, 70, 71, 72, 74, 75, 76, 78, 88, 90, 91, 92, 93, 94, 96, 97, 98, 99, 101, 102, 103
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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G. C. Greubel, Table of n, a(n) for n = 1..5000
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MATHEMATICA
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Select[Range[0, 500], DigitCount[#, 11, 1] == DigitCount[#, 11, 7] &] (* G. C. Greubel, Nov 01 2017 *)
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PROG
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(PARI) isok(n) = my(d=digits(n, 11)); #select(x->(x==1), d) == #select(x->(x==7), d); \\ Michel Marcus, Nov 01 2017
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CROSSREFS
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Sequence in context: A324689 A280578 A303878 * A097624 A000398 A039267
Adjacent sequences: A039167 A039168 A039169 * A039171 A039172 A039173
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KEYWORD
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nonn,base,easy
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AUTHOR
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Olivier Gérard
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STATUS
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approved
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