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A272955 Number of nX5 0..1 arrays with exactly n+5-2 having value 1 and no three 1s forming an isosceles right triangle. 0

%I #3 May 11 2016 14:53:11

%S 5,34,107,210,768,1898,8211,37402,192579,635086,2366644,9742518,

%T 38088673,149636652,590014096,2364716800,9270827068,36956377972,

%U 147747894211,585280946044

%N Number of nX5 0..1 arrays with exactly n+5-2 having value 1 and no three 1s forming an isosceles right triangle.

%C Column 5 of A272958.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A272958.

%K nonn

%O 1,1

%A _R. H. Hardin_, May 11 2016

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Last modified August 27 18:02 EDT 2024. Contains 375471 sequences. (Running on oeis4.)