The On-Line Encyclopedia of Integer Sequences (OEIS)

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A326161

Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
(history; published version)

#4 by R. H. Hardin at Sun Jun 09 08:39:35 EDT 2019

STATUS

editing

approved

#3 by R. H. Hardin at Sun Jun 09 08:39:32 EDT 2019

LINKS

R. H. Hardin, <a href="/A326161/b326161.txt">Table of n, a(n) for n = 1..210</a>

#2 by R. H. Hardin at Sun Jun 09 08:39:16 EDT 2019

NAME

allocated for R. H. Hardin

Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

DATA

5, 11, 25, 85, 261, 838, 2644, 8646, 28076, 91588, 300287, 985329, 3236906, 10639958, 34985229, 115030534, 378227748, 1243694242, 4089598628, 13448040812, 44222592709, 145423018099, 478214308106, 1572578892311, 5171330324530

OFFSET

1,1

COMMENTS

Column 4 of A326165.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A326165.

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin, Jun 09 2019

STATUS

approved

editing

#1 by R. H. Hardin at Sun Jun 09 08:35:48 EDT 2019

NAME

allocated for R. H. Hardin

KEYWORD

allocated

STATUS

approved