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A341273 If A261283(n) = 0, then a(n) = n, otherwise a(n) is obtained by flipping the A261283(n)-th rightmost bit in the binary expansion of n. 1
0, 0, 0, 7, 0, 7, 7, 7, 0, 25, 42, 75, 76, 45, 30, 7, 0, 25, 82, 51, 52, 85, 30, 7, 25, 25, 30, 25, 30, 25, 30, 30, 0, 97, 42, 51, 52, 45, 102, 7, 42, 45, 42, 42, 45, 45, 42, 45, 52, 51, 51, 51, 52, 52, 52, 51, 120, 25, 42, 51, 52, 45, 30, 127, 0, 97, 82, 75 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

All terms belong to A075926.

LINKS

Rémy Sigrist, Table of n, a(n) for n = 0..32768

FORMULA

A261283(a(n)) = 0.

a(a(n)) = a(n).

a(n) = n iff n belongs to A075926.

a(2^k) = 0 for any k >= 0.

EXAMPLE

For n = 7:

- A261283(7) = 0,

- so a(7) = 7.

For n = 43:

- A261283(43) = 1,

- so a(43) is obtained by flipping the rightmost binary digit in 43,

- a(43) = 42.

PROG

(PARI) a(n) = { my (m=n, x=0); while (m, my (v=valuation(m, 2)); x=bitxor(x, v+1); m-=2^v); if (x, bitxor(n, 2^(x-1)), n) }

CROSSREFS

Cf. A075926, A261283.

Sequence in context: A335727 A158857 A255727 * A011438 A321022 A216185

Adjacent sequences:  A341270 A341271 A341272 * A341274 A341275 A341276

KEYWORD

nonn,look,base

AUTHOR

Rémy Sigrist, Feb 08 2021

STATUS

approved

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Last modified August 5 08:27 EDT 2021. Contains 346464 sequences. (Running on oeis4.)