%I #4 Dec 18 2015 18:17:23

%S 4,70,12282,20383931,337547720906,59996420905835268,

%T 121724323699826555003445,2953782468893892488974599595107

%N Number of n X n 0..3 arrays with rows and columns, considered as 4-ary numbers, in strictly increasing order

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 25 2009