A231375 Number of n X n 0..1 arrays with no element less than a strict majority of its horizontal and vertical neighbors

2, 10, 93, 2539, 209118, 54485279, 42978519280, 103861521149940, 768825093368064218, 17400837260687664224580, 1205024418040758639132121433, 255358434130512785761464119154485

Offset

1,1

Comments

Diagonal of A231382

Links

Table of n, a(n) for n=1..12.

Example

Some solutions for n=3
..0..0..1....1..0..0....0..0..1....1..0..0....0..0..0....0..0..1....0..1..0
..0..0..1....0..0..1....0..0..1....1..0..0....1..0..1....0..0..0....0..0..0
..0..0..0....0..1..1....0..0..1....1..1..0....1..0..0....0..0..0....0..0..1

Crossrefs

Sequence in context: A205320 A254243 A026025 * A100622 A355782 A103436

Adjacent sequences: A231372 A231373 A231374 * A231376 A231377 A231378

Keyword

nonn

Author

R. H. Hardin, Nov 08 2013

Status

approved