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 A210816 Number of (n+1)X(n+1) 0..3 symmetric matrices containing all values 0..3 with every 2X2 subblock having three distinct values, and new values 0..3 introduced in lower triangle row major order 0
 0, 12, 551, 49223, 10022877, 4814973856, 5473507216675, 14733719538503109, 93906982953302482787, 1417227544717910923643049 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE Some solutions for n=3 ..0..1..3..3....0..1..1..3....0..1..1..2....0..1..2..1....0..1..1..1 ..1..2..1..2....1..2..0..1....1..2..0..1....1..2..0..0....1..2..0..3 ..3..1..0..2....1..0..3..0....1..0..1..2....2..0..1..3....1..0..3..2 ..3..2..2..1....3..1..0..2....2..1..2..3....1..0..3..2....1..3..2..0 CROSSREFS Sequence in context: A163046 A193381 A224539 * A133415 A192602 A227143 Adjacent sequences:  A210813 A210814 A210815 * A210817 A210818 A210819 KEYWORD nonn AUTHOR R. H. Hardin Mar 27 2012 STATUS approved

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Last modified April 21 10:55 EDT 2019. Contains 322328 sequences. (Running on oeis4.)