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Number of inequivalent n X n matrices with entries from [9], where equivalence means permutations of rows or columns.
2

%I #6 May 02 2022 09:41:36

%S 1,9,1701,10865205,3223155968811,49871029909245781491,

%T 43460016875695276108491159279,

%U 2254372634250117773973027448098778962279,7252372830439610560387220475713321003653570924839924,1493197587365241166689220567691206411606485768307602552950789523519

%N Number of inequivalent n X n matrices with entries from [9], where equivalence means permutations of rows or columns.

%H Alois P. Heinz, <a href="/A246115/b246115.txt">Table of n, a(n) for n = 0..26</a>

%H <a href="/index/Mat#inequiv">Index to number of inequivalent matrices modulo permutation of rows and columns</a>

%Y Column k=9 of A246106.

%K nonn

%O 0,2

%A _Alois P. Heinz_, Aug 14 2014