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A267929 Number of nX2 0..3 arrays with every repeated value in every row and column greater than the previous repeated value. 2
16, 256, 3600, 49284, 646416, 8248384, 102657424, 1251956689, 15001350400, 177032245504, 2061337861696, 23718185697424, 270017722670656, 3044657592269056, 34033540434657856, 377424464034508969 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A267933.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 65*a(n-1) -1714*a(n-2) +21994*a(n-3) -104609*a(n-4) -629015*a(n-5) +9424776*a(n-6) -16529832*a(n-7) -255376098*a(n-8) +1037637378*a(n-9) +3611188980*a(n-10) -20939962212*a(n-11) -32646831786*a(n-12) +213582240666*a(n-13) +202683094344*a(n-14) -1065454174440*a(n-15) -388324470141*a(n-16) +2871948084957*a(n-17) -843801825042*a(n-18) -3200868080118*a(n-19) +3106724901291*a(n-20) -847288609443*a(n-21)

EXAMPLE

Some solutions for n=4

..1..1....1..3....3..2....2..3....1..0....3..3....1..3....0..3....3..3....0..2

..3..2....2..0....1..2....3..0....0..1....1..1....1..2....0..1....0..3....3..2

..1..2....3..2....0..3....3..2....1..1....3..0....0..3....3..3....2..1....3..1

..1..3....3..0....3..3....0..3....0..3....3..1....3..3....0..1....3..3....1..0

CROSSREFS

Cf. A267933.

Sequence in context: A223677 A207277 A294329 * A122609 A206571 A206791

Adjacent sequences:  A267926 A267927 A267928 * A267930 A267931 A267932

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 22 2016

STATUS

approved

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Last modified August 18 08:57 EDT 2019. Contains 326077 sequences. (Running on oeis4.)