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A280901
Number of nX7 0..2 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
1
34, 184076, 162640161, 91647699996, 42393379206019, 17508860441441769, 6718652421698535725, 2448407789410628918742, 858754574814302324217872, 292445632786957126081923641, 97284552066245842895422600165
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A280902.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..27
EXAMPLE
Some solutions for n=2
..0..1..0..1..2..0..0. .0..1..0..1..2..2..1. .0..1..0..1..1..1..1
..1..0..0..2..0..2..2. .0..1..1..2..0..1..2. .1..2..0..2..0..2..0
CROSSREFS
Cf. A280902.
Sequence in context: A243314 A358490 A189649 * A279376 A189311 A189253
Adjacent sequences: A280898 A280899 A280900 * A280902 A280903 A280904
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 10 2017
STATUS
approved

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Last modified October 21 12:15 EDT 2024. Contains 376980 sequences.
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