A262117 Number of (n+1)X(1+1) 0..2 arrays with each row and column prime, read as a base 3 number with top and left being the most significant digits.

5, 5, 23, 47, 133, 369, 1206, 3427, 11146, 37720, 122198, 411529, 1414251, 4916092

Offset

1,1

Comments

Column 1 of A262122.

Links

Table of n, a(n) for n=1..14.

Example

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

Crossrefs

Cf. A262122.

Sequence in context: A175713 A090936 A366443 * A145764 A165826 A256693

Adjacent sequences: A262114 A262115 A262116 * A262118 A262119 A262120

Keyword

nonn

Author

R. H. Hardin, Sep 11 2015

Status

approved