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A337250
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Numbers having at least one 3 in their representation in base 4.
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14
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3, 7, 11, 12, 13, 14, 15, 19, 23, 27, 28, 29, 30, 31, 35, 39, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 67, 71, 75, 76, 77, 78, 79, 83, 87, 91, 92, 93, 94, 95, 99, 103, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119
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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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EXAMPLE
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18 is not in the sequence since it is 102_4 in base 4, but 19 is in the sequence since it is 103_4 in base 4.
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MAPLE
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seq(`if`(numboccur(3, convert(n, base, 4))>0, n, NULL), n=0..100);
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MATHEMATICA
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Select[ Range[ 0, 100 ], (Count[ IntegerDigits[ #, 4 ], 3 ]>0)& ]
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PROG
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(PARI) isok(m) = #select(x->(x==3), digits(m, 4)) >= 1; \\ Michel Marcus, Sep 20 2020
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CROSSREFS
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Cf. A196032 (at least one 0 in base 4).
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KEYWORD
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nonn,base,easy
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AUTHOR
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STATUS
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approved
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