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A284078 Number of 4Xn 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements. 1
0, 0, 314, 7302, 147864, 2696970, 45973823, 754541156, 11967618472, 185031284250, 2806789996272, 41897592713742, 617056516191321, 8986059093265166, 129599934394187822, 1853438708093687988, 26311359259223459474 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Row 4 of A284075.
LINKS
FORMULA
Empirical recurrence of order 84 (see link above)
EXAMPLE
Some solutions for n=4
..0..1..1..0. .1..0..0..0. .1..1..0..0. .0..1..1..1. .0..0..0..1
..1..1..1..1. .0..0..0..0. .0..1..1..1. .1..0..1..0. .1..1..0..1
..1..0..1..0. .1..1..1..0. .1..1..0..1. .0..1..1..1. .1..1..1..0
..0..1..1..1. .1..1..1..0. .1..0..1..1. .1..0..1..1. .0..0..1..1
CROSSREFS
Cf. A284075.
Sequence in context: A157621 A230945 A183691 * A231021 A104819 A283901
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 19 2017
STATUS
approved

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Last modified May 20 14:08 EDT 2024. Contains 372717 sequences. (Running on oeis4.)