A172607 - OEIS

%I #6 Dec 27 2023 12:06:52

%S 1,1026608414145600,58142871081888953760431694254592000,

%T 3201055426099561623149772782827411540384767799931904000000,

%U 32039970364449358738657145679393908929276464603866377637139985914971871928320000000

%N Number of 7*n X 3*n 0..1 arrays with row sums 3 and column sums 7.

%H R. H. Hardin, <a href="/A172607/b172607.txt">Table of n, a(n) for n=1..11</a>

%K nonn

%O 1,2

%A _R. H. Hardin_, Feb 06 2010