A262106 Number of (n+1)X(1+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.

7, 17, 54, 171, 554, 1926, 6976, 25923, 99597, 395785

Offset

1,1

Comments

Column 1 of A262109.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A262109.

Sequence in context: A115914 A352616 A094534 * A371715 A081632 A276907

Adjacent sequences: A262103 A262104 A262105 * A262107 A262108 A262109

Keyword

nonn

Author

R. H. Hardin, Sep 11 2015

Status

approved