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A068472
Number of n X n binary matrices with every 1 having at most 3 adjacent 1's.
0
1, 2, 16, 496, 58640, 26536192, 45851039232, 302758305892480, 7638804476736307712, 736437724731312162567680, 271287639195997221896855543808, 381862430868672544566361613406502912
(list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
Table of n, a(n) for n=0..11.
CROSSREFS
No adjacent 1's A006506, one adjacent 1 A067968.
Sequence in context: A012461 A012458 A012171 * A168402 A168406 A140310
Adjacent sequences: A068469 A068470 A068471 * A068473 A068474 A068475
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 10 2002
EXTENSIONS
a(0)=1 prepended by Alois P. Heinz, Sep 26 2024
STATUS
approved

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Last modified October 21 10:41 EDT 2024. Contains 376980 sequences.
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