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A250050
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Numbers n such that m = floor(n/5) is coprime to n and, if nonzero, m is also a term of the sequence.
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8
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1, 5, 6, 7, 8, 9, 26, 27, 28, 29, 31, 36, 37, 38, 39, 41, 43, 46, 47, 49, 131, 133, 136, 137, 139, 141, 143, 146, 147, 148, 149, 156, 157, 158, 159, 181, 186, 187, 188, 189, 191, 193, 196, 197, 199, 206, 207, 208, 209, 216, 217, 218, 219, 231, 233, 236, 237
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OFFSET
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1,2
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COMMENTS
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See the comments in A250040 which all apply, except for the setting of the base, b=5. In particular, they define the property RTC(b).
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LINKS
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PROG
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(PARI) is_rtc(n, b=5) = {while (((m=gcd(n\b, n)) == 1), if (m == 0, return (1)); if ((n=n\b) == 0, return (1)); ); return (0); } \\ Michel Marcus, Jan 31 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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