re A000028 and A000379

[N. J. A. Sloane]

should be made.
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From: "David Wilson" <davidwwilson at comcast.net>
To: "N. J. A. Sloane" <njas at research.att.com>,
   "Sequence Fans" <seqfan at ext.jussieu.fr>
References: <200712210221.lBL2LX7t011935 at prim.research.att.com>
Subject: Re: re A000028 and A000379
Date: Thu, 20 Dec 2007 23:38:17 -0500
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I suggest these steps to follow up on the A000028/A0000379 fix:

- On A000028 (and possibly A026416) add the following comment:

%C A000028 Sometime after 1995, the definition of A000028 was changed so 
that it differed from N0187 and A0520. This error was found and corrected in 
12/2007. The erroneous version of A000028 was essentially the same as 
A026416.

- A064175 is now a duplicate of A000028. Merge A064175 into A000028 and kill 
it as a duplicate.

- A064176 is now a duplicate of A000379. Merge A064176 into A000028 and kill 
it as a duplicate.

- A131180 is a duplicate of A026416. Merge A131180 into A026416. Since 
A131180 is only a couple months old, you might want to just reuse the 
A-number rather than kill it.

- Have the team check the programs on A000028 to make sure they match the 
correct version and not the erroneous version.

- Sift through the OEIS and make sure any references to A000028, A000379, 
A026416 are accurate. References to A064175/A064176/A131180 should be 
changed to A000028/A000379/A026416.


----- Original Message ----- 
From: "N. J. A. Sloane" <njas at research.att.com>
To: <seqfan at ext.jussieu.fr>
Cc: <njas at research.att.com>
Sent: Thursday, December 20, 2007 9:21 PM
Subject: re A000028 and A000379


> Dear Seqfans:
>
> Thanks to everyone who contributed to this discussion.
> Indeed, the original definitions of A000028 and A000379
> have somehow been corrupted over the years.
> I have restored the original definitions, added Maple
> programs, and recomputed the entries and the b-files.
>
> The definition given for A000028 that was there until
> an hour ago was:
>
> %N A000028 A 2-way classification of integers: a(1) = 2, a(2) = 3, and for 
> n > 2, a(n) is smallest number > a(n-1) not of the form a(i)*a(j) for 1 <= 
> i < j < n.
>
> This is not the right definition of A000028 and has now been replaced.
>
> I have not been following the discussion about these sequences very
> closely.  Now that A000028 and A000379 have been corrected,
> perhaps members of the list can suggest what further changes
> should be made.
>
> Best regards
>
> Neil
>
>
>
> -- 
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