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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
0
1, 16, 13259, 198313130, 39758352524643, 104628720219120084935, 3612824935976380302597462081, 1636876887880533270191858718052988313
OFFSET
1,2
COMMENTS
Diagonal of A233147
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 04 2013
STATUS
approved