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A250049 Numbers n such that m = floor(n/6) is not coprime to n and, if nonzero, m is also a term of the sequence. 8
2, 3, 4, 5, 12, 14, 16, 18, 21, 24, 26, 28, 30, 35, 72, 74, 75, 76, 84, 86, 88, 96, 98, 100, 108, 110, 111, 112, 126, 129, 144, 146, 147, 148, 156, 158, 160, 168, 170, 172, 180, 182, 183, 184, 185, 210, 215, 432, 434, 435, 436, 444, 446, 448, 450, 453, 455 (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=6. 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 A250041 for b=6

(PARI) is_rtnc(n, b=6) = {while (((m=gcd(n\b, n)) != 1), if (m == 0, return (1)); n = n\b; ); return (0); } \\ Michel Marcus, Jan 31 2015

CROSSREFS

Cf. A250041 (b=10), A250046.

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

A005823 (b=3), A250037 (b=4), A250039 (b=16), A250043 (b=9), A250045 (b=8), A250047 (b=7), A250051 (b=5).

Sequence in context: A039007 A050745 A077375 * A132027 A103651 A093713

Adjacent sequences:  A250046 A250047 A250048 * A250050 A250051 A250052

KEYWORD

nonn,base

AUTHOR

Stanislav Sykora, Jan 31 2015

STATUS

approved

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Last modified May 23 04:09 EDT 2017. Contains 286909 sequences.