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A236270 Number of (n+1)X(n+1) 0..2 arrays with the upper median unequal to the lower median in every 2X2 subblock 0
42, 1770, 232736, 98027150, 130035577996, 547421266314876, 7256435693960552708, 303476498154185022737026, 39925368786070957735567191914 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A236278

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A208077 A009986 A041841 * A216703 A258393 A187365

Adjacent sequences:  A236267 A236268 A236269 * A236271 A236272 A236273

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 21 2014

STATUS

approved

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Last modified June 19 20:06 EDT 2021. Contains 345144 sequences. (Running on oeis4.)