login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A326165.

LINKS

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

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.

Sequence in context: A018368 A050344 A318033 * A038253 A274681 A287350

Adjacent sequences:  A326158 A326159 A326160 * A326162 A326163 A326164

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 09 2019

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 4 08:20 EDT 2020. Contains 336201 sequences. (Running on oeis4.)