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A233499 Number of (2+2)X(n+2) 0..2 arrays with no increasing sequence of length 3 horizontally or antidiagonally downwards 1
424009, 26851581, 1709348346, 108934667695, 6940835448966, 442240878862773, 28176593184596215, 1795219762788597690, 114378735336956365968, 7287404963779880864407, 464301857642373045877140 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A233497

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..0..1....0..0..1....0..0..1....0..1..0....0..1..1

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

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

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

CROSSREFS

Sequence in context: A253965 A253761 A204412 * A282337 A192228 A234737

Adjacent sequences:  A233496 A233497 A233498 * A233500 A233501 A233502

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 11 2013

STATUS

approved

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Last modified July 22 16:34 EDT 2019. Contains 325224 sequences. (Running on oeis4.)