A043777 Numbers n such that number of runs in the base 3 representation of n is congruent to 1 mod 4.

1, 2, 4, 8, 13, 26, 40, 80, 91, 92, 96, 97, 100, 101, 102, 104, 121, 138, 140, 141, 142, 145, 146, 150, 151, 172, 173, 177, 178, 181, 182, 183, 185, 192, 194, 195, 196, 208, 209, 210, 212, 242, 253, 254, 258, 259, 262, 263, 264

Offset

1,2

Links

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

Mathematica

Select[Range[300], Mod[Length[Split[IntegerDigits[#, 3]]], 4]==1&] (* Harvey P. Dale, May 02 2020 *)

Crossrefs

Sequence in context: A212906 A043774 A361818 * A043781 A043786 A043792

Adjacent sequences: A043774 A043775 A043776 * A043778 A043779 A043780

Keyword

nonn,base

Author

Clark Kimberling

Status

approved