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!)
A147490 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11101-10111 pattern in any orientation. 0
1, 1, 1, 1, 3, 5, 13, 17, 35, 51, 1825, 3971, 48723, 116645, 1517741, 3942921, 214672131, 697172557, 31731412817, 118373336977, 6545880122717, 27404882486137, 4959503000804673, 24825440098741127 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..24.

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

.0.1.0.0.0.0.1.0

.0.1.1.0.0.1.1.0

CROSSREFS

Sequence in context: A065311 A206549 A040158 * A266234 A180008 A089996

Adjacent sequences:  A147487 A147488 A147489 * A147491 A147492 A147493

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 July 26 20:29 EDT 2021. Contains 346295 sequences. (Running on oeis4.)