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 A304925 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 5 or 7 king-move adjacent elements, with upper left element zero. 1

%I #4 May 21 2018 09:15:56

%S 64,101,466,2510,16158,104451,649029,4123792,26044218,164807242,

%T 1044534208,6613431999,41884985873,265314965161,1680416845681,

%U 10643571331212,67416006000459,427006099213009,2704626555301813

%N Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 5 or 7 king-move adjacent elements, with upper left element zero.

%C Column 7 of A304926.

%H R. H. Hardin, <a href="/A304925/b304925.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

%e ..0..0..1..0..0..0..0. .0..0..0..0..0..0..0. .0..0..1..0..0..1..0

%e ..0..0..0..0..0..0..1. .0..0..0..0..0..0..1. .1..0..0..0..0..0..0

%e ..0..0..0..0..0..0..0. .0..1..1..0..0..0..0. .0..0..0..0..0..0..1

%e ..0..1..1..0..0..0..0. .0..0..0..0..0..0..0. .0..1..0..0..0..0..0

%e ..0..1..1..0..0..1..0. .0..0..0..0..1..0..0. .1..0..0..0..0..0..0

%Y Cf. A304926.

%K nonn

%O 1,1

%A _R. H. Hardin_, May 21 2018

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Last modified June 16 22:16 EDT 2024. Contains 373432 sequences. (Running on oeis4.)