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!)
A253486 Number of (5+1)X(n+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically 1

%I #4 Jan 02 2015 10:26:55

%S 187704,13347930,1029772234,78704951512,6038749847806,462971719837062,

%T 35518545028273216,2724284315820353036,208979165632398419724,

%U 16029897424341313070302,1229615670749498056544226

%N Number of (5+1)X(n+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically

%C Row 5 of A253482

%H R. H. Hardin, <a href="/A253486/b253486.txt">Table of n, a(n) for n = 1..103</a>

%e Some solutions for n=1

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

%e ..1..0....0..2....1..1....0..1....0..1....1..2....0..1....1..0....2..0....0..1

%e ..0..1....0..1....0..1....1..1....2..0....2..0....0..0....2..2....0..0....0..1

%e ..2..1....0..0....2..1....0..1....2..0....0..2....0..2....0..2....2..0....1..0

%e ..0..2....2..2....0..2....0..0....0..1....2..0....0..1....1..1....1..0....1..2

%e ..2..1....2..2....2..1....2..1....1..2....0..2....1..0....2..2....1..0....0..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 02 2015

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 June 22 09:29 EDT 2024. Contains 373568 sequences. (Running on oeis4.)