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A192999
Number of n X n symmetric 0..5 arrays with each element equal to at least two horizontal or vertical neighbors and with new values 0..5 introduced in lower triangular row major order
0
0, 1, 1, 6, 35, 697, 19477, 1547414, 202362287, 65040382838, 35339335932669
OFFSET
1,4
EXAMPLE
Some solutions for 8X8 containing a 5
..0..0..0..0..0..0..0..0....0..0..1..1..0..0..2..2....0..0..0..1..1..3..3..3
..0..0..1..1..0..0..0..0....0..0..1..1..0..0..2..2....0..0..0..1..1..3..3..3
..0..1..1..1..2..2..4..4....1..1..1..2..2..2..4..4....0..0..1..1..2..2..2..2
..0..1..1..2..2..2..4..4....1..1..2..2..2..2..4..4....1..1..1..1..2..2..2..2
..0..0..2..2..3..3..0..0....0..0..2..2..3..3..5..5....1..1..2..2..0..0..4..4
..0..0..2..2..3..3..0..0....0..0..2..2..3..3..5..5....3..3..2..2..0..0..4..4
..0..0..4..4..0..0..5..5....2..2..4..4..5..5..1..1....3..3..2..2..4..4..5..5
..0..0..4..4..0..0..5..5....2..2..4..4..5..5..1..1....3..3..2..2..4..4..5..5
CROSSREFS
Sequence in context: A152128 A115457 A192998 * A193000 A193001 A128298
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 14 2011
STATUS
approved