%I #8 Jul 30 2017 22:23:19

%S 1,489,9230193,6913624013061,207345516734034667209

%N Number of potential flows in n X n array with integer velocities in -4..4, i.e., number of n X n arrays with adjacent elements differing by no more than 4, counting arrays differing by a constant only once.

%Y By size 3 X 3, ..., 6 X 6 A068744-A068747, by velocity limit 1..14 A068248-A068761, solenoidal flows A068722-A068738.

%K nonn

%O 1,2

%A _R. H. Hardin_, Feb 27 2002