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A250045 Numbers n such that m = floor(n/8) is not coprime to n and, if nonzero, m is also a term of the sequence. 9
2, 3, 4, 5, 6, 7, 16, 18, 20, 22, 24, 27, 30, 32, 34, 36, 38, 40, 45, 48, 50, 51, 52, 54, 56, 63, 128, 130, 132, 134, 144, 146, 147, 148, 150, 160, 162, 164, 165, 166, 176, 178, 180, 182, 192, 194, 195, 196, 198, 216, 219, 222, 240, 242, 243, 244, 245, 246 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See the comments in A250041 which all apply, except for the setting of the base, b=8. In particular, they define the property RTNC(b).

LINKS

Stanislav Sykora, Table of n, a(n) for n = 1..10000

Stanislav Sykora, PARI/GP scripts for genetic threads, with code and comments

Wikipedia, Coprime integers

PROG

(PARI) See the link

(PARI) is_rtnc(n, b=8) = {while (((m=gcd(n\b, n)) != 1), if (m == 0, return (1)); n = n\b; ); return (0); } \\ Michel Marcus, Jan 22 2015

CROSSREFS

Cf. A250041 (b=10), A250044.

Other lists of right-truncatable numbers with the property RTNC(b):

A005823 (b=3), A250037 (b=4), A250039 (b=16), A250043 (b=9), A250047 (b=7), A250049 (b=6), A250051 (b=5).

Sequence in context: A004836 A039030 A162231 * A132028 A285724 A193551

Adjacent sequences:  A250042 A250043 A250044 * A250046 A250047 A250048

KEYWORD

nonn,base

AUTHOR

Stanislav Sykora, Jan 15 2015

STATUS

approved

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Last modified August 17 23:58 EDT 2017. Contains 290682 sequences.