[go: up one dir, main page]
login
The OEIS is supported by the many generous donors to the OEIS Foundation.
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A183457
Number of (n+4)X(n+4) binary arrays with every 1 having exactly three king-move neighbors equal to 1 but with no 2X2 blocks of 1s
0
1, 3, 32, 199, 8702, 248303, 15282749, 2019698992, 349874591303
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A183465
LINKS
Table of n, a(n) for n=1..9.
EXAMPLE
Some solutions for 7X7
..0..0..0..1..0..0..0....0..0..0..1..0..0..0....0..0..0..0..1..0..0
..0..0..1..1..1..0..0....0..0..1..1..1..0..0....0..0..0..1..1..1..0
..0..1..0..0..0..1..0....0..1..0..0..0..1..0....0..0..1..0..0..0..1
..1..1..0..0..1..1..0....1..1..0..0..0..1..1....0..1..1..0..0..1..1
..1..0..0..0..1..0..0....0..1..0..0..0..1..0....0..0..1..0..0..0..1
..0..1..1..1..0..0..0....0..0..1..1..1..0..0....0..0..0..1..1..1..0
..0..0..1..0..0..0..0....0..0..0..1..0..0..0....0..0..0..0..1..0..0
CROSSREFS
Sequence in context: A221464 A119940 A004256 * A322234 A264574 A002059
Adjacent sequences: A183454 A183455 A183456 * A183458 A183459 A183460
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 05 2011
STATUS
approved

Lookup Welcome Wiki Register Music Plot 2 Demos Index WebCam Contribute Format Style Sheet Transforms Superseeker Recents
The OEIS Community
Maintained by The OEIS Foundation Inc.
Last modified November 7 13:46 EST 2024. Contains 377535 sequences.
License Agreements, Terms of Use, Privacy Policy