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!)
A296326 Number of nX7 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 neighboring 1s. 1
1, 45, 278, 1677, 14691, 112235, 850404, 6660799, 51754039, 401363520, 3119306759, 24239641260, 188341349284, 1463488096858, 11372085577974, 88367785063892, 686667612240495, 5335806199766372, 41462375276685856, 322187049424431729 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A296327.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A296327.

Sequence in context: A127073 A089549 A178540 * A064561 A291177 A093761

Adjacent sequences:  A296323 A296324 A296325 * A296327 A296328 A296329

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 10 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 April 6 18:38 EDT 2020. Contains 333286 sequences. (Running on oeis4.)