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

1,3

COMMENTS

Column 7 of A272965.

LINKS

Table of n, a(n) for n=1..9.

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

Adjacent sequences:  A272961 A272962 A272963 * A272965 A272966 A272967

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 11 2016

STATUS

approved

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Last modified March 3 04:26 EST 2021. Contains 341756 sequences. (Running on oeis4.)