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A238519 Number of (n+1) X (2+1) 0..3 arrays with no element equal to all horizontal neighbors or equal to all vertical neighbors. 1
588, 9612, 345744, 10332060, 321566028, 9918146448, 306521859084, 9468890997276, 292536258921504, 9037550907769116, 279205473387683676, 8625745262429841312, 266482953705659809356, 8232698585182917536556 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A238523.
LINKS
FORMULA
Empirical: a(n) = 21*a(n-1) +297*a(n-2) +360*a(n-3) -2756*a(n-4) -2972*a(n-5) -3851*a(n-6) +31899*a(n-7) -15873*a(n-8) -11376*a(n-9) +11160*a(n-10) -5184*a(n-11) -3456*a(n-12).
EXAMPLE
Some solutions for n=2
..3..2..0....2..3..0....3..0..1....3..1..2....1..0..1....0..3..0....3..1..0
..1..3..1....3..0..3....2..1..0....1..2..1....2..3..0....2..0..1....2..0..2
..3..1..2....2..3..1....1..0..1....2..1..3....1..0..3....1..2..3....1..2..1
CROSSREFS
Cf. A238523.
Sequence in context: A211852 A178973 A259248 * A185884 A115487 A210894
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 28 2014
STATUS
approved

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Last modified June 24 22:33 EDT 2024. Contains 373690 sequences. (Running on oeis4.)