A033066 Numbers whose base-15 representation Sum_{i=0..m} d(i)*15^i has odd d(m-i) for all odd i.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 20, 22, 24, 26, 28, 31, 33, 35, 37, 39, 41, 43, 46, 48, 50, 52, 54, 56, 58, 61, 63, 65, 67, 69, 71, 73, 76, 78, 80, 82, 84, 86, 88, 91, 93, 95, 97, 99, 101, 103, 106, 108, 110, 112, 114, 116, 118, 121, 123

Offset

1,2

Links

Table of n, a(n) for n=1..65.

Maple

q:= n-> (l-> andmap(x-> x::odd, [seq(l[-i], i=2..nops(l), 2)]))(convert(n, base, 15)):
select(q, [$1..123])[];  # Alois P. Heinz, Jul 22 2025

Crossrefs

Disjoint with A032965 if more than 1 digit.

Sequence in context: A290748 A035062 A032964 * A246075 A246078 A246085

Adjacent sequences: A033063 A033064 A033065 * A033067 A033068 A033069

Keyword

nonn,base

Author

Clark Kimberling

Extensions

Definition corrected by R. J. Mathar and Alois P. Heinz, Jul 22 2025

Status

approved