[seqfan] Re: Erroneous Approved Sequences

Heinz, Alois alois.heinz at hs-heilbronn.de
Sun Oct 20 21:48:31 CEST 2019


A056959 goes from 1 to 4, whereas A025586 stops when 1 is reached.
Their definition is slightly different.

Am 20.10.2019 um 20:37 schrieb P. Michael Hutchins:
> These two sequences can't both be right:
> (I think A025586 is.)
>
> A056959  In repeated iterations of function m->m/2 if m even, m->3m+1 if m
> odd, a(n) is maximum value achieved if starting from n.
> 4, 4, 16, 4, 16, 16, 52
>
> A025586  Largest value in '3x+1' trajectory of n.
> 1, 2, 16, 4, 16, 16, 52
>
> Given that we're reticent to edit Approved sequences, what should
> be done in this clear case?
>
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