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A232904 Number of (n+1)X(4+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally 1
82, 2958, 68310, 1827866, 49501666, 1295371950, 34359557398, 911287659098, 24111990771426, 638690599346926, 16916564376211478, 447986082796161306, 11864651140789377762, 314224727892695330094, 8321876493183410580246 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A232908

LINKS

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

FORMULA

Empirical: a(n) = 15*a(n-1) +146*a(n-2) +4060*a(n-3) +3337*a(n-4) +51521*a(n-5) -1196482*a(n-6) -4066972*a(n-7) +17562664*a(n-8) +32259984*a(n-9) -75792736*a(n-10) +388808640*a(n-11) +150692992*a(n-12) -157018624*a(n-13) +430094336*a(n-14) -361963520*a(n-15) +192413696*a(n-16) -92798976*a(n-17) +16777216*a(n-18)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A281603 A234253 A031606 * A230395 A017798 A035736

Adjacent sequences:  A232901 A232902 A232903 * A232905 A232906 A232907

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 02 2013

STATUS

approved

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Last modified June 21 00:40 EDT 2021. Contains 345329 sequences. (Running on oeis4.)