A068751 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.

1, 489, 9230193, 6913624013061, 207345516734034667209

Offset

1,2

Links

Table of n, a(n) for n=1..5.

Crossrefs

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

Sequence in context: A230005 A221940 A221739 * A172951 A287329 A303556

Adjacent sequences: A068748 A068749 A068750 * A068752 A068753 A068754

Keyword

nonn

Author

R. H. Hardin, Feb 27 2002

Status

approved