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A250046
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Numbers n such that m = floor(n/7) is coprime to n and, if nonzero, m is also a term of the sequence.
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11
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1, 7, 8, 9, 10, 11, 12, 13, 50, 51, 52, 53, 54, 55, 57, 59, 61, 64, 65, 67, 68, 71, 73, 78, 79, 80, 81, 82, 83, 85, 89, 92, 93, 94, 95, 96, 97, 351, 353, 358, 359, 361, 362, 365, 367, 369, 372, 373, 374, 375, 376, 377, 379, 383, 386, 387, 388, 389, 391, 400
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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=7. In particular, they define the property RTC(b).
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LINKS
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PROG
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(PARI) See the link
(PARI) is_rtc(n, b=7) = {while (((m=gcd(n\b, n)) == 1), if (m == 0, return (1)); if ((n=n\b) == 0, return (1)); ); return (0); } \\ Michel Marcus, Jan 18 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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