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A272957 Number of nX7 0..1 arrays with exactly n+7-2 having value 1 and no three 1s forming an isosceles right triangle. 0
7, 100, 499, 1840, 8211, 26052, 131056, 648178, 4336294 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A272958.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A272958.

Sequence in context: A041087 A041084 A115066 * A123616 A001594 A297151

Adjacent sequences:  A272954 A272955 A272956 * A272958 A272959 A272960

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 11 2016

STATUS

approved

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Last modified August 14 21:07 EDT 2018. Contains 313756 sequences. (Running on oeis4.)