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A210178 Number of (n+1)X4 0..3 arrays containing all values 0..3 with every 2X2 subblock having three or four distinct values, and new values 0..3 introduced in row major order 1
744, 79017, 7363642, 677791782, 62264517380, 5718695139568, 525217898009080, 48237037195753208, 4430181416208443992, 406876280707186239248, 37368290569123715949088, 3431974791829880915134368 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A210183

LINKS

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

FORMULA

Empirical: a(n) = 93*a(n-1) +199*a(n-2) -28711*a(n-3) +35176*a(n-4) +2453690*a(n-5) -5602318*a(n-6) -51561340*a(n-7) +96505796*a(n-8) +378763976*a(n-9) -653899024*a(n-10) -988302720*a(n-11) +1830649984*a(n-12) +381532160*a(n-13) -1548998656*a(n-14) +621346816*a(n-15) -44040192*a(n-16)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A235252 A268891 A306281 * A192731 A288261 A000521

Adjacent sequences:  A210175 A210176 A210177 * A210179 A210180 A210181

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 18 2012

STATUS

approved

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Last modified July 25 03:53 EDT 2021. Contains 346283 sequences. (Running on oeis4.)