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A206234 Number of (n+1) X 5 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order. 1
1640, 5728, 27168, 283728, 1236432, 9042600, 95322432, 419146392, 3065437344, 32314300392, 142090622832, 1039183255560, 10954547828832, 48168721135992, 352283123630784, 3713591713969992, 16329196465097232, 119423978910831720 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A206238.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) + 339*a(n-3) - 339*a(n-4) for n>8.

Empirical g.f.: 8*x*(205 + 511*x + 2680*x^2 - 37425*x^3 - 54141*x^4 + 67251*x^5 - 86751*x^6 + 107163*x^7) / ((1 - x)*(1 - 339*x^3)). - Colin Barker, Jun 14 2018

EXAMPLE

Some solutions for n=4:

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

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

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

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

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

CROSSREFS

Cf. A206238.

Sequence in context: A218010 A298075 A239160 * A158775 A234986 A043464

Adjacent sequences:  A206231 A206232 A206233 * A206235 A206236 A206237

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 05 2012

STATUS

approved

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Last modified January 21 17:52 EST 2022. Contains 350479 sequences. (Running on oeis4.)