A233140 Number of n X n 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order

1, 16, 13259, 198313130, 39758352524643, 104628720219120084935, 3612824935976380302597462081, 1636876887880533270191858718052988313

Offset

1,2

Comments

Diagonal of A233147

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A290770 A223102 A167062 * A249968 A017188 A168576

Adjacent sequences: A233137 A233138 A233139 * A233141 A233142 A233143

Keyword

nonn

Author

R. H. Hardin, Dec 04 2013

Status

approved