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Half the number of n X 5 binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.
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%I #13 Aug 19 2024 17:13:20

%S 15,285,4541,66579,944157,13182673,182702967,2522968803,34777826197,

%T 478971480223,6593672923115,90751017499077,1248904863846397,

%U 17186379018703213,236498372271010941,3254365880309197587,44781833050605593997,616220311429717310963

%N Half the number of n X 5 binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.

%H Sean A. Irvine, <a href="/A069405/b069405.txt">Table of n, a(n) for n = 1..250</a>

%Y Cf. 1 X n A000225, 2 X n A016269, 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_, Aug 19 2024