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!)
A235172 Number of (n+1) X (4+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). 1
49464, 250708, 1264228, 6419300, 32642908, 166600788, 851849276, 4369637236, 22453582476, 115730224136, 597466831456, 3093443358060, 16040915831000, 83411062046800, 434345297621000, 2267796795419484, 11856418582385728 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..98

EXAMPLE

Some solutions for n=1:

  0 1 7 6 0     6 1 0 2 1     6 5 6 5 4     3 5 7 0 2

  3 0 2 5 3     4 3 6 4 7     5 0 5 0 3     0 6 4 1 7

CROSSREFS

Column 4 of A235175.

Sequence in context: A185921 A251912 A251910 * A251026 A210351 A234563

Adjacent sequences:  A235169 A235170 A235171 * A235173 A235174 A235175

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 04 2014

STATUS

approved

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 July 6 12:26 EDT 2022. Contains 355110 sequences. (Running on oeis4.)