[seqfan] Re: Remeven numbers
M. F. Hasler
oeis at hasler.fr
Sun Jan 5 14:59:07 CET 2020
On Sun, Jan 5, 2020 at 4:45 AM Neil Sloane wrote:
> the remodd numbers do not seem especially rare: I get
>
> 43, 47, 73, 87, 223, 227, 253, 267, 283, 289, 337, 343, 349, 367, 379, 397,
> 433, 439, 463, 467, 469, 477, 489, 493, 523, 553, 583, 643, 647, 649, 669,
> 673, 677, 687, 689, 733, 747, 787, 799, 823, 827, 829, 849, 853, 869, 883,
> 887, 889, 943, 997,...
- does anyone agree? Both should be added to the OEIS, I think.
I agree and propose drafts for oeis.org/A330981 and oeis.org/A330982.
On Sat, Jan 4, 2020 at 9:34 PM Éric Angelini wrote:
> > A remeven number is a positive integer such that when divided
> > successively by all its digits the remainder is always even:
>
@Robert D-B.: "successively" can be ignored here, it can and should be done
in parallel.
(Probably Eric had not (yet) activated parallel processing in his brain
when he posted this and therefore divided the number by each of its digits
one after the other. And/or it was meant to avoid the interpretation
"divided by [the product of] all of the digits".)
> S = 1,2,3,4,5,6,7,8,9,11,12,14,15,16,18,22,24,26,28,32,...
> > (no zero digit allowed in n, of course)
> > The remodd numbers, like 73, are less common, I guess.
>
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