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!)
A293089 Number of 3 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1. 1
0, 1, 53, 486, 4091, 32070, 246852, 1897509, 14578434, 112390406, 867693603, 6716080364, 52061270779, 404329966577, 3144612848086, 24493415901992, 191015933608631, 1491484435347360, 11658153191250672, 91217811828544156 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 3 of A293087.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

CROSSREFS

Cf. A293087.

Sequence in context: A261537 A142209 A322043 * A177120 A165555 A201855

Adjacent sequences:  A293086 A293087 A293088 * A293090 A293091 A293092

KEYWORD

nonn,changed

AUTHOR

R. H. Hardin, Sep 30 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 6 11:02 EDT 2020. Contains 333273 sequences. (Running on oeis4.)