

A250047


Numbers n such that m = floor(n/7) is not coprime to n and, if nonzero, m is also a term of the sequence.


11



2, 3, 4, 5, 6, 14, 16, 18, 20, 21, 24, 27, 28, 30, 32, 34, 35, 40, 42, 44, 45, 46, 48, 98, 100, 102, 104, 112, 114, 116, 118, 126, 128, 129, 130, 132, 140, 142, 144, 145, 146, 147, 150, 153, 168, 170, 171, 172, 174, 189, 192, 195, 196, 198, 200, 202, 210
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OFFSET

1,1


COMMENTS

See the comments in A250041 which all apply, except for the setting of the base, b=7. In particular, they define the property RTNC(b).


LINKS



PROG

(PARI) See the link
(PARI) is_rtnc(n, b=7) = {while (((m=gcd(n\b, n)) != 1), if (m == 0, return (1)); n = n\b; ); return (0); } \\ Michel Marcus, Jan 22 2015


CROSSREFS

Other lists of righttruncatable numbers with the property RTNC(b):


KEYWORD

nonn,base


AUTHOR



STATUS

approved



