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Number of n X 9 binary arrays with a path of adjacent 1's from top row to bottom row.
1

%I #14 Apr 30 2024 17:04:09

%S 511,242461,105683341,43843180113,17792504911231,7146486319870849,

%T 2856738227918860537,1139431807812280823353,454016084146597129480639,

%U 180827014727915133583355805,72007238386097441302774324845,28672084199736350940864453233905

%N Number of n X 9 binary arrays with a path of adjacent 1's from top row to bottom row.

%H Sean A. Irvine, <a href="/A069384/b069384.txt">Table of n, a(n) for n = 1..200</a>

%Y Cf. 1 X n A000225, 2 X n A005061, n X 2 A001333, vertical path of 1 A069361-A069395, vertical paths of 0+1 A069396-A069416, vertical path of 1 not 0 A069417-A069428, no vertical paths A069429-A069447, no horizontal or vertical paths A069448-A069452.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 22 2002

%E More terms from _Sean A. Irvine_, Apr 30 2024