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A303807 Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 4 king-move adjacent elements, with upper left element zero. 1
21, 127, 83, 202, 291, 597, 1217, 2767, 6147, 14940, 34846, 84947, 210191, 538910, 1368999, 3502960, 8990885, 23400795, 61220178, 160733766, 422311782, 1114702509, 2954914697, 7862464520, 20960436098, 55991586940, 149902307803 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A303808.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A303808.

Sequence in context: A053052 A243882 A002299 * A304854 A305251 A316551

Adjacent sequences:  A303804 A303805 A303806 * A303808 A303809 A303810

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 30 2018

STATUS

approved

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Last modified June 25 08:27 EDT 2021. Contains 345453 sequences. (Running on oeis4.)