A279660 Number of 4Xn 0..2 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

0, 232, 20448, 1546164, 104452983, 6415919752, 371727892628, 20600287800984, 1104065179999916, 57631683424913986, 2945114091239324182, 147893462582517217145, 7318785413508975774938, 357709488329762373571289

Offset

1,2

Comments

Row 4 of A279657.

Links

R. H. Hardin, Table of n, a(n) for n = 1..64

Example

Some solutions for n=3
..0..1..0. .0..1..1. .0..0..0. .0..0..0. .0..1..0. .0..1..2. .0..0..1
..0..0..0. .0..1..1. .1..2..0. .0..1..2. .0..1..1. .1..1..0. .1..1..0
..0..2..2. .2..1..0. .1..1..0. .2..0..0. .0..1..0. .2..0..1. .1..0..2
..2..0..0. .1..2..1. .2..0..1. .2..1..0. .1..1..2. .0..0..1. .1..0..1

Crossrefs

Cf. A279657.

Sequence in context: A327831 A234682 A156391 * A188401 A307827 A206793

Adjacent sequences: A279657 A279658 A279659 * A279661 A279662 A279663

Keyword

nonn

Author

R. H. Hardin, Dec 16 2016

Status

approved