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!)
A234670 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 (constant-stress 1 X 1 tilings). 1
229272, 1648188, 11826092, 85076140, 612823800, 4421960468, 31951474920, 231249678820, 1675919782860, 12165195549188, 88420148767440, 643663869538676, 4691581089095824, 34248260363836644, 250321059877067092 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for n=1:
0 0 6 1 1 4 0 4 7 7 0 2 0 1 7 0 4 5 6 7
0 4 6 5 1 5 5 5 4 0 5 3 5 2 4 6 6 3 0 5
CROSSREFS
Column 4 of A234672.
Sequence in context: A365885 A351054 A212727 * A324636 A015319 A270515
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 29 2013
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 March 28 13:25 EDT 2024. Contains 371254 sequences. (Running on oeis4.)