The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A234892 Number of (n+1) X (2+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). 1
760, 4024, 20404, 115924, 625480, 3640580, 19965444, 117487100, 648180128, 3842929120, 21274493964, 126918950864, 704449207500, 4225296177556, 23502462471760, 141626870060880, 789204770612276, 4774795329104980 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
Empirical recurrence of order 51 (see link above).
EXAMPLE
Some solutions for n=4:
2 1 4 3 6 3 1 2 0 4 5 4 1 0 3 0 3 2 1 0 2
6 4 6 0 2 0 4 6 5 2 4 2 6 4 6 4 6 4 3 1 4
3 2 3 3 6 5 0 3 1 5 6 3 1 0 1 1 4 1 5 4 6
6 4 6 1 3 1 1 5 2 2 4 0 5 3 5 4 6 2 2 0 3
1 0 3 4 5 4 3 6 4 5 6 1 6 5 6 2 5 0 4 1 5
CROSSREFS
Column 2 of A234898.
Sequence in context: A014747 A258135 A247400 * A233879 A165629 A151633
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 01 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 June 14 08:50 EDT 2024. Contains 373393 sequences. (Running on oeis4.)