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%I #11 Feb 23 2020 14:58:54
%S 0,0,0,1,2,12,87,662,5611,51141,509277,5504398,64122940,800741192,
%T 10673478573,151323048909
%N Number of n X n matrices over {0,1} with rows and columns summing to 3, rows and columns sorted (>) by value.
%H Bert Dobbelaere, <a href="/A181345/a181345.pdf">Illustration of initial terms</a>
%e n=4: {1110,1101,1011,0111} is the only matrix where each row (column) - read as a binary number - is larger than the previous one, so a(4)=1.
%Y Cf. A000512, A001501, A181344.
%K hard,nonn
%O 1,5
%A Michael Steyer (m.steyer(AT)osram.de), Oct 18 2010
%E Offset corrected and a(10)-a(16) from _Bert Dobbelaere_, Feb 23 2020
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