[seqfan] Re: Connected relations A287297 a dupe?
franktaw at netscape.net
Fri May 26 20:08:27 CEST 2017
Yes, they're the same. The only difference is that A287297 regards the
data as an array by anti-diagonals, while A262307 regards it as a
triangle. To me, regarding it as an array seems more natural.
Whichever is kept should describe both ways of looking at it.
Currently the description in A262307 is not really adequate.
Franklin T. Adams-Watters
From: Richard J. Mathar <mathar at mpia-hd.mpg.de>
To: seqfan <seqfan at seqfan.eu>
Sent: Fri, May 26, 2017 12:52 pm
Subject: [seqfan] Connected relations A287297 a dupe?
Are oeis.org/A287297 and oeis.org/A262307 the same sequence?
These count binary matrices with no all-zero rows or columns.
There seem to be two relevant works in the literature,mentioned in
A262307 and in A227322. More or less equivalent
ways of reading the array have been added in the Xrefs in A262307.
Richard--Seqfan Mailing list - http://list.seqfan.eu/
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