A068472 Number of n X n binary matrices with every 1 having at most 3 adjacent 1's.

1, 2, 16, 496, 58640, 26536192, 45851039232, 302758305892480, 7638804476736307712, 736437724731312162567680, 271287639195997221896855543808, 381862430868672544566361613406502912

Offset: 0

Author

R. H. Hardin, Mar 10 2002

Keywords

• nonn

Crossrefs

No adjacent 1's A006506, one adjacent 1 A067968.

Extensions

a(0)=1 prepended by Alois P. Heinz, Sep 26 2024