# [seqfan] Re: Matrix sequence

franktaw at netscape.net franktaw at netscape.net
Sat Nov 30 08:06:02 CET 2013

```I have submitted this as https://oeis.org/draft/A232773

-----Original Message-----
From: W. Edwin Clark <wclark at mail.usf.edu>
To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
Sent: Sat, Nov 30, 2013 12:49 am
Subject: [seqfan] Re: Matrix sequence

With Maple's help I get:

1, 10, 450, 55456, 14480700, 6878394720, 5373548250000,
6427291156586496,
11157501095973529920, 26968983444160450560000,
87808164603589940623344000,
374818412822626584819196231680, 2050842983500342507649178541536000,
14112022767608502582976078751055052800,
120142393609740734132923604417900064000000,
1247685757487613731555240243531523777626112000,
15611215293201211704775763606599418680180549632000,
232779239639608473840862118609020721416520230502400000,
4096457619901863802759384962306684567203571548729315328000

which differs from your results in the 4th term. But this is still not
in
the OEIS. In fact 55456 lies in only one sequence (if you don't count A
numbers) which is clearly not the right sequence.

--Edwin Clark

On Sat, Nov 30, 2013 at 12:02 AM, <franktaw at netscape.net> wrote:

> What is the permanent of the matrix:
>
> 1 2 ... n
> n+1 n+2 ... 2n
> ...
> n^2-n+1 n^2-n+2 ... n^2  ?
>
> The sequence appears to start
>
> 1,10,450,55128
>
> from n-1; this is not in the database. (These were hand-calculated.)
>
>
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