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A241330 Number of 3Xn 0..3 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..3 introduced in row major order 1
5, 85, 2344, 68935, 2034543, 60066019, 1773370241, 52356524981, 1545760698649, 45636645554004, 1347364712395962, 39779252976746762, 1174432544392935470, 34673647645893709738, 1023695951556996550068, 30223338828856554979455 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A241328

LINKS

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

FORMULA

Empirical: a(n) = 31*a(n-1) -26*a(n-2) -530*a(n-3) +271*a(n-4) +1431*a(n-5) +437*a(n-6) +157*a(n-7) -438*a(n-8) -846*a(n-9) -243*a(n-10) -243*a(n-11) for n>13

EXAMPLE

Some solutions for n=4

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

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

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

CROSSREFS

Sequence in context: A195156 A188918 A218139 * A301435 A280575 A318635

Adjacent sequences:  A241327 A241328 A241329 * A241331 A241332 A241333

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 19 2014

STATUS

approved

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Last modified August 4 19:27 EDT 2020. Contains 336202 sequences. (Running on oeis4.)