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A241324 Number of nX3 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
2, 59, 2344, 95144, 3875244, 157912026, 6435036610, 262234101215, 10686305830308, 435477843275035, 17746165666239258, 723174326871008607, 29470090437788760318, 1200936203282125872968, 48939373545548944414862 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A241328

LINKS

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

FORMULA

Empirical: a(n) = 45*a(n-1) -171*a(n-2) -57*a(n-3) -1321*a(n-4) +2701*a(n-5) +10837*a(n-6) +5209*a(n-7) +13262*a(n-8) -1578*a(n-9) -7272*a(n-10) -5706*a(n-11) -17487*a(n-12) -2511*a(n-13) +4779*a(n-14) -729*a(n-15)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A283489 A051055 A003827 * A139190 A050283 A096758

Adjacent sequences:  A241321 A241322 A241323 * A241325 A241326 A241327

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 19 2014

STATUS

approved

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Last modified August 24 14:53 EDT 2019. Contains 326295 sequences. (Running on oeis4.)