A043311 a(n)=A033005(n)/8.

1, 2, 3, 4, 5, 6, 49, 51, 52, 53, 54, 55, 98, 99, 101, 102, 103, 104, 147, 148, 149, 151, 152, 153, 196, 197, 198, 199, 201, 202, 245, 246, 247, 248, 249, 251, 294, 295, 296, 297, 298, 299, 2402, 2403, 2404, 2405, 2406, 2407, 2499

Offset

1,2

Comments

Numbers which, written in base 49, have only digits 0 through 6 and no two adjacent digits equal. - M. F. Hasler, Feb 03 2014

Links

Table of n, a(n) for n=1..49.

Prog

(PARI) is_A043311(n)=(n=[n])&&!until(!n[1], ((n=divrem(n[1], 49))[2]<7 && n[1]%7!=n[2])||return) \\ M. F. Hasler, Feb 03 2014

Crossrefs

Cf. A043307 - A043320, A043291, A033001 - A033014, A033016 - A033029. ~

Sequence in context: A173575 A024641 A250262 * A171594 A044908 A024642

Adjacent sequences: A043308 A043309 A043310 * A043312 A043313 A043314

Keyword

nonn,base

Author

Clark Kimberling

Status

approved