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Main diagonal of square array defined in A047675.
1

%I #6 Mar 07 2020 01:36:09

%S 1,4,2304,584325558976905216,

%T 35313389841821364727572472840336561596134691007780285818034354666813122266941990584103364198400

%N Main diagonal of square array defined in A047675.

%K nonn

%O 0,2

%A _N. J. A. Sloane_