A233210 Number of n X n 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order

1, 23, 35446, 1340889772, 919538740854193, 11130643973331790638169, 2376789549887845473135654118063, 8953226350132547895513770025061062694978

Offset

1,2

Comments

Diagonal of A233217

Links

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

Example

Some solutions for n=3
..0..0..0....0..1..1....0..1..2....0..1..0....0..0..1....0..1..5....0..0..1
..1..2..0....5..2..5....2..5..4....0..2..4....2..2..1....5..1..1....2..1..1
..5..2..2....5..4..0....4..0..4....2..0..1....4..0..1....5..5..5....3..0..3

Crossrefs

Sequence in context: A033998 A157167 A273192 * A173369 A185695 A101699

Adjacent sequences: A233207 A233208 A233209 * A233211 A233212 A233213

Keyword

nonn

Author

R. H. Hardin, Dec 06 2013

Status

approved