(0,1) matrices with distinct rows and distinct columns

[Vladeta]

I got that

a(n) = n!*Sum_{k=0..n} Stirling1(n,k)*binomial(2^k,n).

Vladeta J.

___________


----- Original Message -----
From: "Yuval Dekel" <dekelyuval at hotmail.com>
To: <seqfan at ext.jussieu.fr>
Sent: Friday, November 07, 2003 5:57 PM
Subject: (0,1) matrices with distinct rows and distinct columns


> Hi,
> The number of n X n (0,1) matrices with distinct rows is in sequence
A088229
> and this is trivial .
>
> Let me ask if there is a formula for a(n) where:
> a(n) = number of n X n (0,1) matrices with distinct rows and distinct
> columns .
>
> (or perhaps someone can compute a(n) ) .
>
> Thanks,
> Yuval
>
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