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!)
A285023 Number of n X n 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1. 0
0, 2, 97, 6460, 3708321, 5075612300, 40651048407879, 1063834786036208904, 129443742138071637706453 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A285030.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A285030.

Sequence in context: A233767 A223936 A224083 * A232865 A173837 A036901

Adjacent sequences:  A285020 A285021 A285022 * A285024 A285025 A285026

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 08 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 May 10 19:32 EDT 2021. Contains 343780 sequences. (Running on oeis4.)