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A301612 Number of nX5 0..1 arrays with every element equal to 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero. 1

%I #4 Mar 24 2018 11:40:34

%S 3,111,2131,40085,758338,14345706,271301458,5131197358,97045266159,

%T 1835413254015,34712996298775,656524254453280,12416789603607923,

%U 234837748693978527,4441467446525879000,84001117092821240904

%N Number of nX5 0..1 arrays with every element equal to 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.

%C Column 5 of A301615.

%H R. H. Hardin, <a href="/A301612/b301612.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A301612/a301612.txt">Empirical recurrence of order 68</a>

%F Empirical recurrence of order 68 (see link above)

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A301615.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 24 2018

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Last modified February 29 19:10 EST 2024. Contains 370428 sequences. (Running on oeis4.)