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A224583 Number of (n+6)X9 0..1 matrices with each 7X7 subblock idempotent 1

%I

%S 125525,22928,21966,24293,26294,27945,29066,30031,35282,44719,57279,

%T 72507,89253,106861,125137,148577,181148,226344,286350,362933,456996,

%U 569113,704154,871995,1084810,1357286,1706012,2148697,2703197,3392851

%N Number of (n+6)X9 0..1 matrices with each 7X7 subblock idempotent

%C Column 3 of A224588

%H R. H. Hardin, <a href="/A224583/b224583.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 2*a(n-1) -2*a(n-2) +2*a(n-3) -2*a(n-4) +3*a(n-5) -3*a(n-6) +3*a(n-7) -2*a(n-8) +a(n-9) -a(n-10) -2*a(n-13) +2*a(n-14) -2*a(n-15) +2*a(n-16) -2*a(n-17) +3*a(n-18) -2*a(n-19) +2*a(n-20) -a(n-21) +a(n-22) -a(n-23) +a(n-24) -a(n-25) for n>33

%e Some solutions for n=2

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

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Apr 11 2013

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Last modified May 14 16:48 EDT 2021. Contains 343898 sequences. (Running on oeis4.)