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A261937
Number of (n+1)X(2+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, 2, 5, 12, 31, 57, 112, 296, 833, 1889, 5015, 11625, 30782, 80154, 202448, 526705, 1410549, 3698903
OFFSET
1,2
COMMENTS
Column 2 of A261942.
EXAMPLE
Some solutions for n=4
..0..0..1....1..1..0....1..1..0....0..0..0....1..0..0....0..0..0....0..0..0
..0..0..1....0..0..0....1..0..0....1..0..0....1..0..0....0..0..1....0..0..0
..0..0..1....0..0..0....1..0..0....1..1..0....1..1..0....0..0..1....0..0..1
..1..1..0....0..0..1....0..0..1....0..0..1....0..0..1....1..1..0....1..1..0
..0..0..1....1..1..0....1..1..0....1..1..0....1..1..0....0..0..1....0..0..1
CROSSREFS
Cf. A261942.
Sequence in context: A112412 A309506 A319557 * A305311 A291239 A193284
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 06 2015
STATUS
approved