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A234069 Number of (1+2)X(n+2) 0..3 arrays with no increasing sequence of length 3 horizontally or diagonally downwards 1
205808, 10268904, 502595832, 24576912260, 1199897571228, 58576345841356, 2859193780644876, 139560139052400248, 6811998968783551560, 332496786974014167368, 16229306364406839778800, 792159143550043088739188 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 1 of A234068

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

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

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

CROSSREFS

Sequence in context: A177006 A236033 A234068 * A234061 A234060 A115946

Adjacent sequences:  A234066 A234067 A234068 * A234070 A234071 A234072

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 19 2013

STATUS

approved

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Last modified January 26 15:18 EST 2022. Contains 350599 sequences. (Running on oeis4.)