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A234231 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 3 (constant-stress 1 X 1 tilings). 1
449880, 7024396, 108591688, 1709929028, 26695387444, 424316463256, 6683714234372, 107392220427904, 1707887729007672, 27776485661813004, 446386639744976512, 7358199411212748552, 119609164298524638804 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for n=1:
2 3 2 1 0 4 4 0 1 3 2 4 3 3 2 6 5 7 1 3
4 2 4 0 2 0 3 2 0 5 2 7 3 0 2 4 0 5 2 1
CROSSREFS
Column 4 of A234233.
Sequence in context: A210173 A202569 A224635 * A227702 A210332 A209714
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 21 2013
STATUS
approved

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Last modified July 13 09:52 EDT 2024. Contains 374274 sequences. (Running on oeis4.)