A163053 Number of n X 9 binary arrays with all 1s connected, and all corners 1.

1, 577, 191285, 54271807, 15044778941, 4145512873039, 1137758959706016, 311436369777161740, 85122294170211885098, 23248440821509926268336, 6347334201234151157373251, 1732681120227558837819110261, 472948741485300221353418257651, 129090752280925038986218448736843

Offset

1,2

Links

Andrew Howroyd, Table of n, a(n) for n = 1..200

Crossrefs

Column 9 of A389687.

Sequence in context: A221331 A163042 A069365 * A097770 A252377 A252376

Adjacent sequences: A163050 A163051 A163052 * A163054 A163055 A163056

Keyword

nonn

Author

R. H. Hardin, Jul 20 2009

Extensions

a(7) onward from Andrew Howroyd, Oct 26 2025

Status

approved