A265972 Number of nX7 0..4 arrays with the absolute differences of each element with its with horizontal and vertical neighbors unique.

17012, 953072, 1282192, 2263704, 5120120, 13435392, 34825856, 92019824, 231761056, 593080872, 1481688160, 3832636952, 9840184608, 25358167888, 64217497384, 165719314208, 425547780616, 1093883487608, 2780744054920

Offset: 1

Author

R. H. Hardin, Dec 19 2015

Keywords

• nonn

Comments

Column 7 of A265973.

Examples

			Some solutions for n=1
..3..3..1..2..2..3..1....0..4..1..0..0..4..4....0..2..2..0..3..3..4
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..160

Crossrefs

Cf. A265973.