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A302370 Number of 4Xn 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
8, 3, 109, 77, 918, 3125, 21831, 125193, 824459, 5383504, 35779184, 240480550, 1615536651, 10916466595, 73707212142, 498626574631, 3372684616301, 22824815728427, 154471448375476, 1045558911080013, 7077203544387174 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 4 of A302367.
LINKS
FORMULA
Empirical recurrence of order 63 (see link above)
EXAMPLE
Some solutions for n=5
..0..1..1..0..0. .0..0..1..1..0. .0..0..1..1..1. .0..0..0..1..1
..0..1..1..0..0. .0..0..0..1..1. .0..0..0..1..0. .1..0..1..1..1
..0..1..1..0..0. .0..0..1..1..0. .1..0..1..1..1. .0..0..0..1..1
..1..1..0..0..1. .1..0..0..1..1. .1..0..1..1..1. .1..0..1..1..0
CROSSREFS
Cf. A302367.
Sequence in context: A302462 A303244 A038281 * A303086 A131502 A302891
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 06 2018
STATUS
approved

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Last modified July 18 04:06 EDT 2024. Contains 374377 sequences. (Running on oeis4.)