A335134 Fixed points of A335133.

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 28, 29, 30, 31, 32, 33, 36, 37, 58, 59, 62, 63, 64, 65, 66, 67, 72, 73, 74, 75, 116, 117, 118, 119, 124, 125, 126, 127, 128, 129, 134, 135, 146, 147, 148, 149, 234, 235, 236, 237, 248, 249, 254, 255, 256

Offset

1,3

Comments

The EQ-triangles generated from the binary expansion of the terms of this sequence have reflection symmetry through axis U-U:

. U

. .___________

. \ . /

. \ . /

. \ .

. \ / .

. \ / U

. v

Links

Table of n, a(n) for n=1..61.

Rémy Sigrist, Illustration of initial terms

Example

A335133(28) = 28, so 28 belongs to this sequence.

Prog

(PARI) is(n) = {
    my (b=binary(n), v=0);
    forstep (x=#b-1, 0, -1,
        if (b[1], v+=2^x);
        b=vector(#b-1, k, b[k]==b[k+1])
    );
    v==n
}

Crossrefs

Cf. A335133.

Sequence in context: A032987 A174876 A092597 * A334918 A354220 A125506

Adjacent sequences: A335131 A335132 A335133 * A335135 A335136 A335137

Keyword

nonn,base

Author

Rémy Sigrist, May 24 2020

Status

approved