[seqfan] Re: Need help reverse engineering sequence from Per Noergard

[Neil Sloane]

Jon, Jean-Paul:

A004718 has a formula,

a(n) = (2 * (n mod 2) - 1) * a(floor(n/2)) + n mod 2. - _Reinhard
Zumkeller_, Mar 20 2015

which implies a(2n) = -a(n) and so a(n) = a(4n) = a(16n) = ...



On Sun, Dec 30, 2018 at 6:34 PM Jon Wild <wild at music.mcgill.ca> wrote:

> On Sun, 30 Dec 2018, Neil Sloane wrote:
>
> > I'll also add a comment about the fractal-like property of the infinity
> > sequence (based on taking every 16-th term), which was new to me.
>
> Better check it first, beyond the first few values! (I only checked as far
> as the included part of the sequence in the A-file)
>
> Jon
>
>
>
>
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