A273963 Number of nX4 0..3 arrays with no three equal values forming an isosceles right triangle, and new values introduced in 0..3 order.

15, 1264, 49702, 543906, 4010258, 16365681, 55643290, 210405148, 904155053, 4384022592, 21350702064, 105038486755, 514302715276, 2558243582787

Offset: 1

Author

R. H. Hardin, Jun 05 2016

Keywords

• nonn

Comments

Column 4 of A273964.

Examples

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

Crossrefs

Cf. A273964.