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A210408
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Number of (n+1)X4 0..3 arrays with every 2X2 subblock having three or four distinct values, and new values 0..3 introduced in row major order
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1
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864, 80496, 7380816, 677993552, 62266883792, 5718722907600, 525218223843536, 48237041019306960, 4430181461077005264, 406876281233712454096, 37368290575302443698896, 3431974791902387709770704
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OFFSET
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1,1
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COMMENTS
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Column 3 of A210413
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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FORMULA
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Empirical: a(n) = 81*a(n-1) +1151*a(n-2) -13041*a(n-3) -117154*a(n-4) +478740*a(n-5) +445664*a(n-6) -2873152*a(n-7) +2422784*a(n-8) -196608*a(n-9)
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EXAMPLE
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Some solutions for n=4
..0..0..0..0....0..0..0..1....0..0..0..0....0..0..1..0....0..0..1..1
..1..2..1..3....1..2..1..2....1..2..3..2....1..2..1..2....1..2..2..3
..1..0..0..1....2..0..1..3....2..0..2..0....0..0..1..0....3..0..3..0
..0..2..3..2....1..3..0..0....3..0..1..2....3..2..1..2....0..1..3..1
..1..1..0..3....1..0..2..3....3..2..3..1....0..0..3..1....3..2..1..0
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CROSSREFS
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Sequence in context: A299220 A300034 A064321 * A299413 A300055 A082243
Adjacent sequences: A210405 A210406 A210407 * A210409 A210410 A210411
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin Mar 21 2012
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STATUS
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approved
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