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!)
A234917 Number of (n+1)X(4+1) 0..4 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
1200, 3912, 13336, 55492, 221272, 990956, 4151672, 19178920, 82629808, 389619632, 1717580400, 8224749716, 36995561312, 179190965356, 820121135880, 4004385313088, 18595010158432, 91280836990776, 428929645226328 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A234921

LINKS

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

R. H. Hardin, Empirical recurrence of order 54

FORMULA

Empirical recurrence of order 54 (see link above)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A137261 A252531 A043408 * A167985 A237001 A022056

Adjacent sequences:  A234914 A234915 A234916 * A234918 A234919 A234920

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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 20 10:43 EDT 2021. Contains 348100 sequences. (Running on oeis4.)