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A210837
Number of (n+1)X(n+1) 0..3 symmetric matrices with every 2X2 subblock having two, three or four distinct values, and new values 0..3 introduced in lower triangle row major order
1
4, 157, 34848, 32087451, 116765092684, 1675364225009869, 94777043088521233200, 21139495208799287816738519, 18590180528543794272963690721687, 64457007550068881643906256762264646455
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for n=3
..0..1..3..0....0..1..0..1....0..1..3..3....0..1..1..0....0..1..1..1
..1..2..3..2....1..1..0..0....1..2..3..0....1..0..0..0....1..2..2..2
..3..3..1..3....0..0..2..1....3..3..2..3....1..0..1..2....1..2..0..0
..0..2..3..1....1..0..1..0....3..0..3..2....0..0..2..0....1..2..0..1
CROSSREFS
Sequence in context: A202298 A003736 A354285 * A289231 A204680 A205156
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 27 2012
STATUS
approved