A236270 Number of (n+1)X(n+1) 0..2 arrays with the upper median unequal to the lower median in every 2X2 subblock

42, 1770, 232736, 98027150, 130035577996, 547421266314876, 7256435693960552708, 303476498154185022737026, 39925368786070957735567191914

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