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A230394 Number of nX3 0..4 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 5, and upper left element zero 1
0, 0, 0, 82, 842, 9068, 92538, 934880, 9391704, 94049146, 940967692, 9409481866, 94075413676, 940474931730, 9401616117802, 93983330933630, 939498690750080, 9391614438889102, 93882313126131660, 938484434686401706 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Column 3 of A230398

LINKS

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

FORMULA

Empirical: a(n) = 15*a(n-1) -44*a(n-2) -93*a(n-3) +286*a(n-4) +436*a(n-5) -67*a(n-6) +325*a(n-7) -11029*a(n-8) +15289*a(n-9) -26186*a(n-10) -6615*a(n-11) +169842*a(n-12) +107741*a(n-13) -150081*a(n-14) -406239*a(n-15) -608005*a(n-16) -626380*a(n-17) -386401*a(n-18) -9896*a(n-19) +315811*a(n-20) +450618*a(n-21) +409245*a(n-22) +287634*a(n-23) +136108*a(n-24) +22145*a(n-25) -20032*a(n-26) -15466*a(n-27) -9896*a(n-28) -2168*a(n-29) +3352*a(n-30) +2352*a(n-31)

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A186688 A002309 A128959 * A173356 A083386 A282159

Adjacent sequences:  A230391 A230392 A230393 * A230395 A230396 A230397

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 18 2013

STATUS

approved

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Last modified December 10 20:48 EST 2017. Contains 295856 sequences.