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A278091
Number of nX5 0..1 arrays with every element both equal and not equal to some elements at offset (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.
1
0, 27, 351, 6285, 114028, 2066549, 37564017, 682015651, 12386272982, 224933023893, 4084803341700, 74180250866019, 1347117071827258, 24463718780065218, 444262411397312418, 8067828888156669904
OFFSET
1,2
COMMENTS
Column 5 of A278094.
FORMULA
Empirical recurrence of order 86 (see link above)
EXAMPLE
Some solutions for n=4
..0..0..0..1..1. .0..1..1..1..1. .0..1..1..1..0. .0..1..1..1..1
..1..1..0..1..0. .0..1..0..0..0. .0..1..0..1..0. .0..0..0..0..0
..1..0..1..0..0. .1..1..1..1..1. .1..0..0..0..0. .1..1..1..1..1
..0..0..0..1..1. .0..0..0..0..1. .1..0..1..1..1. .0..0..0..0..1
CROSSREFS
Cf. A278094.
Sequence in context: A022622 A030648 A223278 * A042410 A110207 A223205
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 11 2016
STATUS
approved