A261947 Number of (5+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, 31, 9350, 50994, 5488030, 52973290, 2828445617, 58321826870

Offset

1,2

Comments

Row 5 of A261942.

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Cf. A261942.

Sequence in context: A135811 A119598 A139295 * A069451 A374668 A073099

Adjacent sequences: A261944 A261945 A261946 * A261948 A261949 A261950

Keyword

nonn

Author

R. H. Hardin, Sep 06 2015

Status

approved