A250048 Numbers n such that m = floor(n/6) is coprime to n and, if nonzero, m is also a term of the sequence.

1, 6, 7, 8, 9, 10, 11, 37, 41, 43, 44, 45, 46, 47, 49, 51, 53, 55, 56, 58, 59, 61, 63, 67, 68, 69, 70, 71, 223, 224, 225, 226, 227, 247, 248, 249, 250, 251, 259, 260, 261, 262, 263, 265, 267, 269, 271, 272, 274, 277, 279, 281, 283, 284, 285, 286, 287, 295

Offset

1,2

Comments

See the comments in A250040 which all apply, except for the setting of the base, b=6. In particular, they define the property RTC(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 A250040 for b=6
(PARI) is_rtc(n, b=6) =  {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

Crossrefs

Cf. A250040 (b=10), A250047.

Other lists of right-truncatable numbers with the property RTC(b): A250036 (b=4), A250038 (b=16), A250042 (b=9), A250044 (b=8), A250046 (b=7), A250050 (b=5).

Sequence in context: A120199 A162786 A269801 * A051053 A178868 A069838

Adjacent sequences: A250045 A250046 A250047 * A250049 A250050 A250051

Keyword

nonn,base

Author

Stanislav Sykora, Jan 31 2015

Status

approved