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A260977 Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00001001 or 00100101 1

%I #4 Aug 06 2015 11:14:38

%S 1146,925,1288,2714,4592,9144,14672,29768,50432,101372,171124,340878,

%T 582500,1157798,1990592,3921926,6784120,13315792,23162244,45162484,

%U 78973048,153447472,269491716,520685028,918595544,1769858760,3133573780

%N Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00001001 or 00100101

%C Column 5 of A260980

%H R. H. Hardin, <a href="/A260977/b260977.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 12*a(n-4) +4*a(n-5) +4*a(n-7) -15*a(n-8) -32*a(n-9) -3*a(n-10) -34*a(n-11) +a(n-12) +16*a(n-13) +8*a(n-14) +28*a(n-15) -51*a(n-16) +40*a(n-17) +16*a(n-18) -36*a(n-19) +33*a(n-20) +224*a(n-21) -4*a(n-23) +64*a(n-24) +128*a(n-25) -24*a(n-27) +64*a(n-28) for n>34

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A260980

%K nonn

%O 1,1

%A _R. H. Hardin_, Aug 06 2015

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)