login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A297643 Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 2 or 3 neighboring 1s. 1

%I

%S 128,883,48187,740555,24145671,659362756,21730243952,663509235615,

%T 21859378312321,724165420377581,24219665849222547,809099326344802420,

%U 27220764680023740725,917228208040260033845,30924465146142596889719

%N Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 2 or 3 neighboring 1s.

%C Row 7 of A297637.

%H R. H. Hardin, <a href="/A297643/b297643.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

%e ..0..0..1. .0..0..0. .0..1..1. .0..0..1. .0..0..0. .0..1..0. .0..1..1

%e ..1..0..1. .0..1..1. .0..1..1. .1..0..0. .0..1..0. .0..0..0. .0..1..1

%e ..0..0..1. .0..1..1. .0..1..0. .0..0..0. .1..1..1. .0..1..1. .0..1..1

%e ..1..0..0. .0..0..0. .1..0..0. .0..1..0. .0..1..0. .0..1..1. .0..1..1

%e ..0..0..0. .0..0..1. .1..1..0. .0..0..0. .1..0..0. .0..0..0. .0..0..1

%e ..0..0..0. .1..0..1. .1..1..0. .1..1..1. .1..1..0. .1..1..0. .0..1..1

%e ..0..0..0. .0..0..1. .0..0..0. .0..1..1. .0..1..1. .1..1..0. .0..1..1

%Y Cf. A297637.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 02 2018

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 18 05:58 EDT 2022. Contains 353783 sequences. (Running on oeis4.)