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A272964
Number of nX7 0..1 arrays with exactly n+7-1 having value 1 and no three 1s forming an isosceles right triangle.
0
1, 1, 16, 71, 367, 838, 4892, 26051, 198970
OFFSET
1,3
COMMENTS
Column 7 of A272965.
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
Cf. A272965.
Sequence in context: A284844 A258724 A264888 * A232579 A212862 A253151
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 11 2016
STATUS
approved