A222989 Number of 4Xn 0..2 arrays with no more than floor(4Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

14, 70, 584, 4572, 42607, 414907, 4405097, 48718472, 555780434, 6416259672, 74903319364, 877918502428, 10342543515649, 122102452706949, 1445864757738121, 17149126185134333, 203824031565924979

Offset

1,1

Comments

Row 4 of A222986

Links

R. H. Hardin, Table of n, a(n) for n = 1..52

Example

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

Crossrefs

Sequence in context: A034554 A246507 A034562 * A245950 A041372 A245951

Adjacent sequences: A222986 A222987 A222988 * A222990 A222991 A222992

Keyword

nonn

Author

R. H. Hardin Mar 11 2013

Status

approved