login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A284225 Number of 4 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero. 1
8, 62, 467, 6511, 85887, 1214427, 17538010, 258414316, 3854276528, 58011648676, 879122723506, 13394856893254, 204995150323546, 3148797878923546, 48517163038369066, 749553577633265717, 11606806249286351346 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A284222.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..176

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A284222.

Sequence in context: A167251 A227439 A144143 * A229011 A126628 A085353

Adjacent sequences:  A284222 A284223 A284224 * A284226 A284227 A284228

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 23 2017

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 1 01:19 EDT 2022. Contains 354947 sequences. (Running on oeis4.)