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!)
A235253 Number of (n+1)X(3+1) 0..7 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 7, with no adjacent elements equal (constant stress tilted 1X1 tilings) 1
2672, 8328, 24232, 80812, 251656, 878988, 2873128, 10362212, 35132248, 129681452, 452445096, 1699526196, 6067071432, 23102391980, 84025709016, 323468947012, 1194691128744, 4640522916700, 17359355152040, 67935545177540 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A235258

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 57

FORMULA

Empirical recurrence of order 57 (see link above)

EXAMPLE

Some solutions for n=4

..6..0..6..2....1..0..3..1....1..5..1..5....3..1..3..0....6..5..6..5

..0..1..0..3....0..6..2..7....5..2..5..2....2..7..2..6....0..6..0..6

..6..0..6..2....3..2..5..3....3..7..3..7....6..4..6..3....5..4..5..4

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

..7..1..7..3....1..0..3..1....1..5..1..5....5..3..5..2....6..5..6..5

CROSSREFS

Sequence in context: A010088 A252301 A250855 * A309762 A344192 A345896

Adjacent sequences:  A235250 A235251 A235252 * A235254 A235255 A235256

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 05 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 July 26 16:44 EDT 2021. Contains 346294 sequences. (Running on oeis4.)