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A250043
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Numbers n such that m = floor(n/9) is not coprime to n and, if nonzero, m is also a term of the sequence.
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9
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2, 3, 4, 5, 6, 7, 8, 18, 20, 22, 24, 26, 27, 30, 33, 36, 38, 40, 42, 44, 45, 50, 54, 56, 57, 58, 60, 62, 63, 70, 72, 74, 76, 78, 80, 162, 164, 165, 166, 168, 170, 180, 182, 184, 185, 186, 188, 198, 200, 202, 204, 206, 216, 218, 219, 220, 222, 224, 234, 236
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OFFSET
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1,1
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COMMENTS
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See the comments in A250041 which all apply, except for the setting of the base, b=9. In particular, they define the property RTNC(b).
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LINKS
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PROG
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(PARI) See the link
(PARI) is_rtnc(n, b=9) = {while (((m=gcd(n\b, n)) != 1), if (m == 0, return (1)); n = n\b; ); return (0); } \\ Michel Marcus, Jan 17 2015
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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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STATUS
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approved
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