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A234917 Number of (n+1) X (4+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 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

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

Column 4 of A234921.

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

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Last modified February 3 23:01 EST 2023. Contains 360045 sequences. (Running on oeis4.)