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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
0, 2, 61, 147, 1215, 5826, 28021, 110420, 527295, 2326284, 9514894, 38982570, 165423942, 702887228, 2961470604, 11652281882, 46921585497, 193805455945 (list; graph; refs; listen; history; text; internal format)
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: A222009 A336297 A041449 * A142729 A167215 A279624

Adjacent sequences:  A261941 A261942 A261943 * A261945 A261946 A261947

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 06 2015

STATUS

approved

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Last modified September 29 07:27 EDT 2020. Contains 337425 sequences. (Running on oeis4.)