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!)
A222660 Number of nX2 0..3 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
0, 0, 2, 9, 26, 103, 446, 1964, 8624, 38467, 172996, 781826, 3543506, 16101962, 73319508, 334431875, 1527675428, 6987461432, 31997430636, 146680198680, 673052434686, 3091103533619, 14208094465250, 65356612821710 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A222666

LINKS

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

EXAMPLE

All solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A136429 A091469 A125670 * A182325 A008910 A239059

Adjacent sequences:  A222657 A222658 A222659 * A222661 A222662 A222663

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 28 2013

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 November 28 22:15 EST 2021. Contains 349415 sequences. (Running on oeis4.)