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A031941 Numbers without consecutive equal base 3 digits. 10
1, 2, 3, 5, 6, 7, 10, 11, 15, 16, 19, 20, 21, 23, 30, 32, 33, 34, 46, 47, 48, 50, 57, 59, 60, 61, 64, 65, 69, 70, 91, 92, 96, 97, 100, 101, 102, 104, 138, 140, 141, 142, 145, 146, 150, 151, 172, 173, 177, 178, 181, 182, 183, 185, 192 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Essentially the same as A043089, b.t.w. the initial "0" could be as well included here. Also: numbers n such that A043277(n)=1. - M. F. Hasler, Jul 23 2013

LINKS

Table of n, a(n) for n=1..55.

FORMULA

A031941 = { n | A043277(n)=1 } = A043089 \ {0}. - M. F. Hasler, Jul 23 2013

PROG

(PARI) for(i=1, 199, A043277(i)==1 & print1(i", ")) \\ - M. F. Hasler, Jul 23 2013

CROSSREFS

Cf. A000975 (base-2 analog), A031942 or A043090 (base-4 analog), A031943 or A043091 (base-5 analog), A043092, ...,  A043096 (base-6 through base-10 analog).

Sequence in context: A240101 A032892 * A043089 A088952 A032851 A102830

Adjacent sequences:  A031938 A031939 A031940 * A031942 A031943 A031944

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

EXTENSIONS

Edited by Charles R Greathouse IV, Aug 02 2010

STATUS

approved

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Last modified March 25 06:41 EDT 2017. Contains 284047 sequences.