A068749 Number of potential flows in n X n array with integer velocities in -2..2, i.e., number of n X n arrays with adjacent elements differing by no more than 2, counting arrays differing by a constant only once.

1, 85, 87825, 1133641543, 184422574177355, 379827509377146575439, 9928923943603018785634645661

Offset

1,2

Links

Table of n, a(n) for n=1..7.

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: A181015 A131750 A239269 * A172826 A196886 A172874

Adjacent sequences: A068746 A068747 A068748 * A068750 A068751 A068752

Keyword

nonn

Author

R. H. Hardin, Feb 27 2002

Status

approved