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 A224684 Number of (n+4)X6 0..1 matrices with each 5X5 subblock idempotent 1

%I

%S 2351,1312,1494,1720,1938,2110,2591,3332,4377,5599,6968,8749,11314,

%T 14818,19530,25558,33366,43649,57438,75842,100289,132470,174892,

%U 231022,305587,404481,535530,708936,938459,1242445,1645315,2179125,2886344,3823000

%N Number of (n+4)X6 0..1 matrices with each 5X5 subblock idempotent

%C Column 2 of A224690

%H R. H. Hardin, <a href="/A224684/b224684.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 2*a(n-1) -a(n-2) +a(n-3) -a(n-4) -a(n-7) +a(n-8) -a(n-9) +a(n-10) +a(n-12) -a(n-13) for n>18

%e Some solutions for n=2

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Apr 15 2013

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Last modified January 22 23:50 EST 2022. Contains 350504 sequences. (Running on oeis4.)