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A213694 Half the number of (n+1)X(n+1) symmetric 0..5 arrays with no 2X2 subblock summing to 10 0

%I #3 Jun 18 2012 07:02:25

%S 99,17499,16537086,83545858925,2256314178023600,325754552781442854792,

%T 251417716503635583550380605

%N Half the number of (n+1)X(n+1) symmetric 0..5 arrays with no 2X2 subblock summing to 10

%C Column 5 of A213697

%e Some solutions for n=4

%e ..1..4..4..1..0....3..3..2..3..3....2..4..3..0..4....2..3..1..0..3

%e ..4..3..1..5..2....3..3..0..4..1....4..4..1..3..5....3..3..2..2..4

%e ..4..1..0..3..3....2..0..3..4..4....3..1..5..2..2....1..2..5..0..0

%e ..1..5..3..2..3....3..4..4..0..5....0..3..2..2..3....0..2..0..2..3

%e ..0..2..3..3..5....3..1..4..5..2....4..5..2..3..3....3..4..0..3..3

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 18 2012

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Last modified June 6 18:47 EDT 2024. Contains 373134 sequences. (Running on oeis4.)