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A259247 Number of (n+1)X(5+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0011 or 0111 1

%I

%S 255,1733,10720,71313,451481,2964676,18970267,123694345,795726064,

%T 5169185873,33344636925,216190905756,1396553927379,9045384191389,

%U 58474650871712,378535391931953,2448013308032361,15842822807262836

%N Number of (n+1)X(5+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0011 or 0111

%C Column 5 of A259250

%H R. H. Hardin, <a href="/A259247/b259247.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 6*a(n-1) +49*a(n-2) -268*a(n-3) -920*a(n-4) +4050*a(n-5) +9218*a(n-6) -25662*a(n-7) -49822*a(n-8) +62672*a(n-9) +120020*a(n-10) -35270*a(n-11) -81969*a(n-12) +4820*a(n-13) +15497*a(n-14) -596*a(n-15) -536*a(n-16) +24*a(n-17)

%e Some solutions for n=4

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

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

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

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

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

%Y Cf. A259250

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 22 2015

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Last modified October 26 14:28 EDT 2021. Contains 348267 sequences. (Running on oeis4.)