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A235973 Number of (n+1)X(n+1) 0..2 arrays with the upper median equal to the lower median in every 2X2 subblock 0
39, 1473, 143183, 46727365, 45610599689, 147068094657177, 1487588729246707713, 48486777403751460298381, 5004721415407427603880128041 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A235981

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A009729 A078970 A020303 * A097314 A162871 A163222

Adjacent sequences:  A235970 A235971 A235972 * A235974 A235975 A235976

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 17 2014

STATUS

approved

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Last modified March 21 20:18 EDT 2019. Contains 321382 sequences. (Running on oeis4.)