

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
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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 (base2 analog), A031942 or A043090 (base4 analog), A031943 or A043091 (base5 analog), A043092, ..., A043096 (base6 through base10 analog).
Sequence in context: A302597 A240101 A032892 * A043089 A088952 A303541
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



