login
A261946
Number of (4+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
0, 12, 1878, 7943, 351513, 3016874, 64650845, 773758878, 10301327801
OFFSET
1,2
COMMENTS
Row 4 of A261942.
EXAMPLE
Some solutions for n=4
..1..0..0..0..0....0..1..0..0..0....1..0..1..0..0....0..0..1..1..0
..0..1..1..0..0....0..1..0..1..0....0..1..0..0..0....0..0..0..0..0
..1..0..1..0..0....0..1..0..0..1....0..1..0..1..0....0..1..0..0..0
..1..1..0..1..1....1..1..1..1..0....1..0..1..0..1....1..1..0..1..1
..1..1..1..0..0....1..1..0..1..1....1..1..1..1..0....1..1..1..1..0
CROSSREFS
Cf. A261942.
Sequence in context: A049405 A229752 A104009 * A015028 A167745 A326601
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 06 2015
STATUS
approved