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!)
A234990 Number of (n+1)X(7+1) 0..5 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant stress tilted 1X1 tilings) 1
762002, 5628414, 58209538, 951853990, 18608169852, 433293595046, 10857686727324, 292379412946254, 8126291847950614, 233115099695210828, 6783985484057006378, 200298891324445897770, 5954479568379696254384 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A234991

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..16

EXAMPLE

Some solutions for n=1

..3..5..2..1..0..5..1..5....3..4..3..1..0..3..4..2....0..1..2..1..2..3..2..5

..0..4..3..0..1..4..2..4....0..3..4..0..1..2..5..1....3..2..1..2..5..4..1..2

CROSSREFS

Sequence in context: A254074 A014889 A014888 * A043673 A233415 A122468

Adjacent sequences:  A234987 A234988 A234989 * A234991 A234992 A234993

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 02 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 24 21:08 EST 2022. Contains 350565 sequences. (Running on oeis4.)