A229517 - OEIS

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A229517

Number of n X 4 0..2 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1) X 5 0..2 array without adjacent equal elements in the latter.

1

39, 481, 4193, 34151, 275243, 2223913, 17910863, 144971845, 1169783337, 9467210619, 76463151051, 618555984777, 4998183735285, 40420906533161, 326695769416007, 2641578123513399, 21352776926914139, 172637934108286039

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OFFSET

1,1

COMMENTS

Column 4 of A229521.

LINKS

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

R. H. Hardin, Empirical recurrence of order 75

FORMULA

Empirical recurrence of order 75 (see link above).

EXAMPLE

Some solutions for n=3:

1 1 2 1 1 1 0 2 1 1 1 2 1 1 2 1 2 1 0 1

1 2 1 1 2 0 2 1 0 1 2 0 1 2 1 2 1 1 1 0

2 0 1 1 0 2 1 2 1 2 0 1 2 0 1 1 2 1 0 1

CROSSREFS

Sequence in context: A210328 A231993 A357958 * A254871 A193072 A077454

Adjacent sequences: A229514 A229515 A229516 * A229518 A229519 A229520

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 25 2013

STATUS

approved