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A233109 Number of nX4 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order 1
23, 6046, 2154065, 794723482, 294285758398, 109015274761891, 40385221182281560, 14960955484170769147, 5542380989283805407733, 2053210330075493118514936, 760624844506193044187974495 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A233113

LINKS

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

FORMULA

Empirical: a(n) = 445*a(n-1) -29415*a(n-2) +684239*a(n-3) -6544703*a(n-4) +26009211*a(n-5) -37153497*a(n-6) +17033721*a(n-7)

EXAMPLE

Some solutions for n=2

..0..1..5..4....0..1..2..4....0..1..2..5....0..1..2..2....0..1..2..5

..2..5..4..2....1..5..2..5....4..3..0..3....1..0..1..2....3..5..4..5

CROSSREFS

Sequence in context: A134801 A059932 A045735 * A193430 A233213 A090674

Adjacent sequences:  A233106 A233107 A233108 * A233110 A233111 A233112

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 04 2013

STATUS

approved

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Last modified August 4 01:48 EDT 2021. Contains 346441 sequences. (Running on oeis4.)