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Number of idempotent 5X5 0..n matrices of rank 2.
0

%I #8 Feb 06 2023 11:56:45

%S 3070,30410,136990,467290,1240310,2986210,6260470,12345410,22576030,

%T 39299170,64929590,104218930,160450990,240932330,352487350

%N Number of idempotent 5X5 0..n matrices of rank 2.

%e Some solutions for n=3

%e ..0..0..0..0..0....0..0..0..0..0....1..2..1..0..0....0..0..1..3..0

%e ..2..1..0..2..1....3..1..2..3..0....0..0..0..0..0....0..0..0..3..3

%e ..1..0..1..1..0....0..0..0..0..0....0..0..0..0..0....0..0..1..3..0

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

%e ..0..0..0..0..0....0..0..3..1..1....0..0..0..3..0....0..0..0..1..1

%Y Row 5 of A224114.

%K nonn,more

%O 1,1

%A _R. H. Hardin_, Apr 09 2013