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Search: id:A145773
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A145773 Number of n X n binary arrays with all ones connected only either two adjacent vertically or two adjacent horizontally. +0
1
1, 5, 25, 314, 7358, 349511, 32855368, 6141909014, 2284689480141, 1689669248970784, 2485350221377308028, 7269523179423750332937, 42286820404292801713317670, 489171492515135237008883532896 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Sequence in context: A143600 A145076 A165656 this_sequence A072324 A082026 A101392

Adjacent sequences: A145770 A145771 A145772 this_sequence A145774 A145775 A145776

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net), Oct 18 2008

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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