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A232364 Number of n X 4 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
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
Cf. A232368.
Sequence in context: A121292 A208304 A258796 * A264562 A211109 A249963
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 23 2013
STATUS
approved

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Last modified July 12 05:51 EDT 2024. Contains 374237 sequences. (Running on oeis4.)