A224617 - OEIS

%I #5 Apr 12 2013 07:46:59

%S 54182,15354,24024,29254,32204,34032,50748,77986,111302,148228,187624,

%T 246190,335440,462208,630792,844338,1124602,1505884,2030116,2744262,

%U 3699158,4970136,6670642,8960714,12052800,16216412,21805522,29300694

%N Number of (n+4)X(n+4) 0..2 matrices with each 5X5 subblock idempotent

%C Diagonal of A224625

%H R. H. Hardin, <a href="/A224617/b224617.txt">Table of n, a(n) for n = 1..29</a>

%e Some solutions for n=2

%e ..1..0..0..0..0..2....1..1..1..1..2..0....1..1..2..2..1..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..2

%e ..1..0..0..0..0..2....0..0..0..0..0..0....0..0..0..0..0..0....2..0..0..0..0..0

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

%e ..1..0..0..0..0..1....0..0..0..0..0..0....0..0..0..0..0..0....2..0..0..0..0..1

%e ..2..0..0..0..0..1....0..2..2..2..1..1....2..1..0..1..1..1....2..0..0..0..0..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Apr 12 2013