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A272972 Number of nX7 0..1 arrays with exactly n+7-2 having value 1 and no three 1s forming an isosceles triangle. 0
7, 18, 23, 8, 10, 4, 4, 4, 2, 48, 24 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A272973.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Cf. A272973.

Sequence in context: A223247 A091832 A256011 * A070609 A007236 A056021

Adjacent sequences:  A272969 A272970 A272971 * A272973 A272974 A272975

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 11 2016

STATUS

approved

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Last modified October 28 03:58 EDT 2021. Contains 348313 sequences. (Running on oeis4.)