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A335134 Fixed points of A335133. 1
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 (list; graph; refs; listen; history; text; internal format)
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 A125506 A079334

Adjacent sequences:  A335131 A335132 A335133 * A335135 A335136 A335137

KEYWORD

nonn,base

AUTHOR

Rémy Sigrist, May 24 2020

STATUS

approved

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Last modified August 14 06:43 EDT 2020. Contains 336477 sequences. (Running on oeis4.)