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A213695 Half the number of (n+1)X(n+1) symmetric 0..6 arrays with no 2X2 subblock summing to 12 0

%I

%S 159,45892,84059234,976919547736,72037480156866493,

%T 33704464361612549676417,100056407652480771734417515110

%N Half the number of (n+1)X(n+1) symmetric 0..6 arrays with no 2X2 subblock summing to 12

%C Column 6 of A213697

%e Some solutions for n=4

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

%e ..3..2..1..1..2....2..0..3..1..5....5..1..2..2..6....4..1..0..3..6

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

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

%e ..0..2..3..0..5....5..5..4..3..6....0..6..4..1..0....0..6..4..5..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 18 2012

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Last modified August 14 06:54 EDT 2022. Contains 356110 sequences. (Running on oeis4.)