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A235172 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 4, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings). 1
49464, 250708, 1264228, 6419300, 32642908, 166600788, 851849276, 4369637236, 22453582476, 115730224136, 597466831456, 3093443358060, 16040915831000, 83411062046800, 434345297621000, 2267796795419484, 11856418582385728 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for n=1:
0 1 7 6 0 6 1 0 2 1 6 5 6 5 4 3 5 7 0 2
3 0 2 5 3 4 3 6 4 7 5 0 5 0 3 0 6 4 1 7
CROSSREFS
Column 4 of A235175.
Sequence in context: A185921 A251912 A251910 * A251026 A210351 A234563
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 04 2014
STATUS
approved

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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)