A209680 Number of n X n 0..5 arrays with every element equal to a diagonal or antidiagonal reflection, and new values 0 upwards introduced in row major order

1, 15, 1508, 6716352, 66825091608, 16894558898454012, 7697358649459140517788, 87677668153076602430717324907, 1797666180378975423054345009058355238, 921444360078430965633564486047727718449222837

Offset

1,2

Comments

Column 4 of A209684

Links

R. H. Hardin, Table of n, a(n) for n = 1..48

Example

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

Crossrefs

Sequence in context: A223058 A200994 A338634 * A122469 A119784 A199228

Adjacent sequences: A209677 A209678 A209679 * A209681 A209682 A209683

Keyword

nonn

Author

R. H. Hardin Mar 11 2012

Status

approved