[seqfan] Counting binary matrices - can these really be new?

[Neil Sloane]

Dear Seq Fans and especially Ron Hardin.
I just added A229161-A229164 based on this paper:
K. Yordzhev, <a href="http://arXiv.org/abs/1305.6790">Fibonacci sequence
related to a combinatorial problem on binary matrices</a>, arXiv preprint
arXiv:1305.6790, 2013

It looks like he is counting binary nXn matrices with a fixed number of 1's
in each row and column, up to permutations of the rows and columns . As he
says, these were not in the OEIS. Hard to believe, so maybe I have
misunderstood the definition. They need more terms.

Someone will probably extend these very quickly, so check
the entries before spending any time on this.
Neil

<njasloane at gmail.com>