A272963 Number of nX6 0..1 arrays with exactly n+6-1 having value 1 and no three 1s forming an isosceles right triangle.

1, 0, 6, 8, 58, 192, 838, 4968, 37436, 250516, 1268025, 5445512

Offset

1,3

Comments

Column 6 of A272965.

Links

Table of n, a(n) for n=1..12.

Example

Some solutions for n=6
..0..0..1..1..0..1. .0..0..0..1..0..1. .1..0..1..0..1..0. .1..1..1..1..0..0
..1..0..0..0..0..1. .0..1..1..0..0..0. .0..0..1..0..0..1. .0..0..0..0..1..0
..0..0..0..0..1..0. .0..0..0..0..0..0. .0..1..0..0..0..0. .0..0..0..0..0..1
..1..0..0..0..0..0. .1..0..0..0..0..1. .1..0..0..0..0..1. .0..1..0..0..0..1
..1..0..0..0..0..1. .0..0..0..0..0..1. .0..0..0..1..0..0. .0..0..0..0..0..1
..0..0..1..0..0..1. .1..1..0..1..1..0. .0..0..0..0..1..1. .1..1..0..0..0..0

Crossrefs

Cf. A272965.

Sequence in context: A192158 A167481 A137122 * A218215 A240544 A136931

Adjacent sequences: A272960 A272961 A272962 * A272964 A272965 A272966

Keyword

nonn

Author

R. H. Hardin, May 11 2016

Status

approved