[seqfan] Re: For bit fiddlers only

[Marc LeBrun]

Is this not essentially HAKMEM Item 175, applied to an initial starting
value x=3?

If so I guess it should be endowed with the formula
  a(0)=3, a(n+1)=A057168(a(n)), n>0
and appropriate references.

The OEIS contains analogs for a number of other x=2^n-1, but the %N's aren't
consistent (eg A038461).

As well, A066884 is a nice square table with all positive integers; A081118
is a related triangle.

A grateful "Happy New Year" to all the hardworking cross-referencers and
editors!


>="Peter Luschny" <peter.luschny at gmail.com>

> Assuming C operators.
> 
> x = 3
> [start]
> print x
> s = x & -x
> r = x + s
> o = x ^ r
> o = (o >> 2) / s
> x = r | o
> goto [start]
> 
> Peter
> 
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