A163011 Number of n X n binary arrays with all 1s connected and a path of 1s from top row to lower right corner.

1, 5, 82, 4776, 1000725, 769984742, 2190944084653, 23073594702606286, 898519848739977333728, 129219019265088217493923647, 68548207653453677261008279952167, 133994525464026566625151212248450625489, 964316440224605630591930234686529750414293398, 25531545121975256597476526279828972606339034752664470

Offset

1,2

Links

Table of n, a(n) for n=1..14.

Crossrefs

Main diagonal of A391489.

Sequence in context: A374615 A274388 A308753 * A393597 A368081 A142162

Adjacent sequences: A163008 A163009 A163010 * A163012 A163013 A163014

Keyword

nonn

Author

R. H. Hardin, Jul 20 2009

Extensions

a(8) onward from Andrew Howroyd, Dec 22 2025

Status

approved