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A210129 Number of (n+1)X4 0..3 arrays with every 2X2 subblock having one, three or four distinct values, and new values 0..3 introduced in row major order 1
897, 84381, 7873809, 735336694, 68668190865, 6412512897051, 598825892889354, 55920742053335527, 5222101117981021055, 487660555133397778704, 45539680606576639531819, 4252676350267258941002997 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A210134

LINKS

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

FORMULA

Empirical: a(n) = 95*a(n-1) -a(n-2) -14266*a(n-3) +20367*a(n-4) +435937*a(n-5) -1093869*a(n-6) -1923590*a(n-7) +8479272*a(n-8) -8472184*a(n-9) +1936944*a(n-10) +631296*a(n-11)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A323964 A145498 A252378 * A158408 A158409 A061044

Adjacent sequences:  A210126 A210127 A210128 * A210130 A210131 A210132

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 17 2012

STATUS

approved

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Last modified July 23 04:23 EDT 2019. Contains 325232 sequences. (Running on oeis4.)