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A232364 Number of nX4 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or vertically 1
15, 887, 39321, 1704619, 74665511, 3271362341, 143280358783, 6275473692531, 274859698649841, 12038586622802263, 527278170826443931, 23094261763297231417, 1011505808556752689163, 44302953319140331180267 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A232368

LINKS

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

R. H. Hardin, Empirical recurrence of order 60

FORMULA

Empirical recurrence of order 60 (see link above)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A121292 A208304 A258796 * A264562 A211109 A249963

Adjacent sequences:  A232361 A232362 A232363 * A232365 A232366 A232367

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 23 2013

STATUS

approved

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Last modified November 27 18:22 EST 2020. Contains 338683 sequences. (Running on oeis4.)