A224637 - OEIS

%I #4 Apr 13 2013 07:36:30

%S 145121216,1268962,1800748,2157776,2323256,2397590,2432656,2451680,

%T 3552688

%N Number of (n+6)X(n+6) 0..2 matrices with each 7X7 subblock idempotent

%C Diagonal of A224642

%e Some solutions for n=2

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Apr 13 2013