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A233620 Number of (2+2)X(n+2) 0..2 arrays with no increasing sequence of length 3 horizontally or diagonally downwards 1
430608, 27826929, 1777375908, 113340508656, 7222554443566, 460194589763836, 29320690351065445, 1868112829445921314, 119023011702892254856, 7583305026602442683556, 483154524353295641124009 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A233618

LINKS

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

R. H. Hardin, Empirical recurrence of order 68

FORMULA

Empirical recurrence of order 68 (see link above)

EXAMPLE

Some solutions for n=1

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

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

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

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

CROSSREFS

Sequence in context: A234857 A186593 A328197 * A271110 A237926 A117318

Adjacent sequences:  A233617 A233618 A233619 * A233621 A233622 A233623

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 14 2013

STATUS

approved

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Last modified June 25 13:16 EDT 2022. Contains 354851 sequences. (Running on oeis4.)