login
A032953
Numbers whose base-3 representation Sum_{i=0..m} d(i)*3^(m-i) has even d(i) for all odd i.
1
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
1,2
COMMENTS
The i's are indexed at zero. - Harvey P. Dale, Aug 03 2021
LINKS
MATHEMATICA
Select[Range[150], AllTrue[Take[IntegerDigits[#, 3], {2, -1, 2}], EvenQ]&] (* Harvey P. Dale, Aug 03 2021 *)
CROSSREFS
Sequence in context: A026359 A367917 A367908 * A270813 A247431 A039033
KEYWORD
nonn,base
EXTENSIONS
Definition corrected by Sean A. Irvine, Nov 17 2020
STATUS
approved