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A210138 Number of (n+1)X4 0..3 arrays containing all values 0..3 with every 2X2 subblock having one, two or four distinct values, and new values 0..3 introduced in row major order 1
105, 4349, 159327, 5451164, 178904077, 5714971168, 179321691502, 5559548788474, 170972595046842, 5229087409961369, 159331519832860386, 4842527307715760107, 146922920026150589111, 4452400930651345522825, 134818625964532109683635 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A210143

LINKS

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

FORMULA

Empirical: a(n) = 89*a(n-1) -3068*a(n-2) +51966*a(n-3) -443001*a(n-4) +1546826*a(n-5) +1718332*a(n-6) -24576952*a(n-7) +30663994*a(n-8) +107350909*a(n-9) -226371596*a(n-10) -140409398*a(n-11) +501187032*a(n-12) -47667796*a(n-13) -343494224*a(n-14) +74492360*a(n-15) +92532416*a(n-16) -19372128*a(n-17) -8588160*a(n-18) +1382400*a(n-19)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A112490 A006361 A221791 * A075350 A165055 A168306

Adjacent sequences:  A210135 A210136 A210137 * A210139 A210140 A210141

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 17 2012

STATUS

approved

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Last modified October 19 16:25 EDT 2021. Contains 348091 sequences. (Running on oeis4.)