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A198713 Number of nX6 0..3 arrays with values 0..3 introduced in row major order and no element equal to any horizontal or vertical neighbor 2
41, 8404, 1749965, 364637102, 75987485516, 15835552812749, 3300094936852775, 687733321797971342, 143322307142433346196, 29868095632655586533219, 6224454258216624967544685, 1297164418016611898106044912 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A198715

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n) = 313*a(n-1) -25836*a(n-2) +915863*a(n-3) -16213670*a(n-4) +144756201*a(n-5) -517271096*a(n-6) -1142631169*a(n-7) +16130100519*a(n-8) -49834494904*a(n-9) +41222570902*a(n-10) +81411834252*a(n-11) -186980689770*a(n-12) +120589827444*a(n-13) -21008679048*a(n-14)

EXAMPLE

Some solutions with all values from 0 to 3 for n=4

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

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

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

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

CROSSREFS

Sequence in context: A325481 A199652 A241111 * A208319 A201171 A208389

Adjacent sequences:  A198710 A198711 A198712 * A198714 A198715 A198716

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 29 2011

STATUS

approved

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Last modified May 26 21:56 EDT 2022. Contains 354092 sequences. (Running on oeis4.)