A261756 Number of (n+1)X(3+1) 0..1 arrays with each row and column prime, read as a binary number with top and left being the most significant bits.

0, 19, 19, 99, 138, 197, 380, 2580, 5892, 10199, 47851, 139642, 450312, 1068661, 2955411, 13601486, 48492065

Offset

1,2

Comments

Column 3 of A261761.

Links

Table of n, a(n) for n=1..17.

Example

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

Crossrefs

Cf. A261761.

Sequence in context: A040343 A022353 A323177 * A070853 A165840 A266804

Adjacent sequences: A261753 A261754 A261755 * A261757 A261758 A261759

Keyword

nonn

Author

R. H. Hardin, Aug 31 2015

Status

approved