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A233475 Number of (n+2)X(1+2) 0..3 arrays with no increasing sequence of length 3 horizontally or vertically 1
178464, 8840905, 432047816, 21111771232, 1030570080608, 50306732887149, 2455509770023748, 119855189715624816, 5850184020893059584, 285550010593205974009, 13937813362561049133972, 680310394336994074070032 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A233480

LINKS

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

R. H. Hardin, Empirical recurrence of order 54

FORMULA

Empirical recurrence of order 54 (see link above)

EXAMPLE

Some solutions for n=1

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

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

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

CROSSREFS

Sequence in context: A081867 A133972 A233480 * A243901 A254801 A254808

Adjacent sequences:  A233472 A233473 A233474 * A233476 A233477 A233478

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 11 2013

STATUS

approved

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Last modified February 24 22:57 EST 2020. Contains 332216 sequences. (Running on oeis4.)