A272964 - OEIS

A272964

Number of nX7 0..1 arrays with exactly n+7-1 having value 1 and no three 1s forming an isosceles right triangle.

1, 1, 16, 71, 367, 838, 4892, 26051, 198970

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

COMMENTS

Column 7 of A272965.

LINKS

EXAMPLE

Some solutions for n=6

..1..0..0..1..1..0..1. .0..0..0..1..1..1..1. .0..0..1..0..1..1..0

..0..0..0..0..0..0..1. .0..1..0..0..0..0..0. .0..1..0..0..0..0..1

..0..0..0..0..0..1..0. .1..0..0..0..0..0..0. .1..0..0..0..0..0..0

..0..1..0..0..0..0..0. .1..0..0..0..0..0..0. .1..0..0..0..0..0..0

..0..1..0..0..0..0..1. .0..1..0..1..0..0..0. .1..0..0..1..0..1..0

..1..0..0..1..0..0..1. .0..0..0..1..0..1..1. .1..0..0..0..0..0..1

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 11 2016

STATUS

approved