A261755 - OEIS

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A261755

Number of (n+1)X(2+1) 0..1 arrays with each row and column prime, read as a binary number with top and left being the most significant bits.

4, 20, 19, 100, 165, 353, 885, 3548, 8661, 21544, 78052, 265612, 786316, 2171560, 6063182, 26625997, 98070255, 308244775

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 2 of A261761.

LINKS

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

EXAMPLE

Some solutions for n=4

..1..0..1....1..1..1....1..1..1....0..1..1....0..1..1....1..0..1....1..1..1

..1..0..1....0..1..1....1..0..1....1..0..1....1..1..1....1..0..1....1..0..1

..1..1..1....1..1..1....1..0..1....0..1..1....0..1..1....1..1..1....1..1..1

..0..1..0....1..0..1....0..1..0....1..1..1....1..1..1....1..1..1....1..1..1

..1..1..1....1..1..1....1..1..1....1..1..1....1..1..1....1..1..1....1..1..1

CROSSREFS

Cf. A261761.

Sequence in context: A227997 A130316 A131745 * A288319 A330317 A151727

Adjacent sequences: A261752 A261753 A261754 * A261756 A261757 A261758

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 31 2015

STATUS

approved