A261949 Number of (7+1) X (n+1) 0..1 arrays with each row nonprime and column prime, read as a binary number with top and left being the most significant bits.

0, 112, 352480, 2840132, 2499416567, 30673550964

Offset

1,2

Comments

Row 7 of A261942.

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Cf. A261942.

Sequence in context: A270113 A275052 A180039 * A159432 A151645 A115486

Adjacent sequences: A261946 A261947 A261948 * A261950 A261951 A261952

Keyword

nonn,more

Author

R. H. Hardin, Sep 06 2015

Status

approved