A032953 Numbers whose base-3 representation Sum_{i=0..m} d(i)*3^(m-i) has even d(i) for all odd i.

1, 2, 3, 5, 6, 8, 9, 10, 11, 15, 16, 17, 18, 19, 20, 24, 25, 26, 27, 29, 30, 32, 33, 35, 45, 47, 48, 50, 51, 53, 54, 56, 57, 59, 60, 62, 72, 74, 75, 77, 78, 80, 81, 82, 83, 87, 88, 89, 90, 91, 92, 96, 97, 98, 99, 100, 101, 105, 106, 107, 135

Offset: 1

Author

Clark Kimberling

Keywords

• nonn
• base

Comments

The i's are indexed at zero. - Harvey P. Dale, Aug 03 2021

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Disjoint with A033054.

Programs

Mathematica

Select[Range[150],AllTrue[Take[IntegerDigits[#,3],{2,-1,2}],EvenQ]&] (* Harvey P. Dale, Aug 03 2021 *)

Extensions

Definition corrected by Sean A. Irvine, Nov 17 2020