A261944 Number of (2+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, 2, 61, 147, 1215, 5826, 28021, 110420, 527295, 2326284, 9514894, 38982570, 165423942, 702887228, 2961470604, 11652281882, 46921585497, 193805455945

Offset

1,2

Comments

Row 2 of A261942.

Links

Table of n, a(n) for n=1..18.

Example

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

Crossrefs

Cf. A261942.

Sequence in context: A351728 A336297 A041449 * A142729 A167215 A279624

Adjacent sequences: A261941 A261942 A261943 * A261945 A261946 A261947

Keyword

nonn

Author

R. H. Hardin, Sep 06 2015

Status

approved