A262107 Number of (n+1)X(2+1) 0..2 arrays with each row nonprime and column prime, read as a base 3 number with top and left being the most significant digits.

26, 195, 1968, 18933, 186780, 2019171, 23371442

Offset

1,1

Comments

Column 2 of A262109.

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Cf. A262109.

Sequence in context: A181342 A090960 A357178 * A245952 A056026 A159762

Adjacent sequences: A262104 A262105 A262106 * A262108 A262109 A262110

Keyword

nonn

Author

R. H. Hardin, Sep 11 2015

Status

approved