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A272970 Number of nX5 0..1 arrays with exactly n+5-2 having value 1 and no three 1s forming an isosceles triangle. 0
5, 14, 14, 4, 4, 4, 10, 80, 37, 56, 4, 12, 0, 4, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A272973.

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Some solutions for n=3

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

..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0

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

CROSSREFS

Cf. A272973.

Sequence in context: A205134 A196363 A169811 * A168213 A175485 A174657

Adjacent sequences:  A272967 A272968 A272969 * A272971 A272972 A272973

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 11 2016

STATUS

approved

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Last modified September 18 15:27 EDT 2021. Contains 347527 sequences. (Running on oeis4.)