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A141442
Number of n X n integer matrices, symmetric about both diagonal and antidiagonal, with adjacent elements differing by no more than 1, counting matrices differing by a constant only once.
0
1, 3, 27, 171, 3267, 44235, 1827981, 53678097, 4829415021, 309226567689, 60771492609849, 8507664353592081, 3659154831341169651, 1121748956533219703391
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..14.
CROSSREFS
Sequence in context: A129530 A056370 A056361 * A053932 A027507 A297670
Adjacent sequences: A141439 A141440 A141441 * A141443 A141444 A141445
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 06 2008
STATUS
approved

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Last modified October 4 19:29 EDT 2024. Contains 376520 sequences.
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