login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A147422 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10101-11111 pattern in any orientation. 0
1, 1, 1, 1, 15, 5, 49, 17, 271, 61, 18529, 4397, 509931, 142159, 26069792 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.1.1.0.0.1.1.0

.0.0.1.0.0.1.0.0

.0.1.1.0.0.1.1.0

.0.0.1.0.0.1.0.0

.0.1.1.0.0.1.1.0

CROSSREFS

Sequence in context: A131611 A166209 A040215 * A147084 A147361 A147224

Adjacent sequences:  A147419 A147420 A147421 * A147423 A147424 A147425

KEYWORD

nonn

AUTHOR

R. H. Hardin

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 22 08:06 EDT 2019. Contains 322329 sequences. (Running on oeis4.)