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!)
A235238 Number of (n+1)X(7+1) 0..6 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 6, with no adjacent elements equal (constant stress tilted 1X1 tilings) 1

%I

%S 170864,348876,698304,1593940,3548456,8787924,21123784,55565636,

%T 141304528,389137436,1033108024,2948180108,8099212024,23769869420,

%U 67153607264,201544634004,582902960392,1781509519796,5256618469672

%N Number of (n+1)X(7+1) 0..6 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 6, with no adjacent elements equal (constant stress tilted 1X1 tilings)

%C Column 7 of A235239

%H R. H. Hardin, <a href="/A235238/b235238.txt">Table of n, a(n) for n = 1..28</a>

%e Some solutions for n=1

%e ..3..1..5..1..3..0..4..0....4..2..3..0..5..1..3..1....1..6..2..6..1..4..1..5

%e ..1..5..3..5..1..4..2..4....2..6..1..4..3..5..1..5....3..2..4..2..3..0..3..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 05 2014

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 September 21 16:31 EDT 2021. Contains 347598 sequences. (Running on oeis4.)