The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A261946 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A261946

Number of (4+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.
(history; published version)

#3 by R. H. Hardin at Sun Sep 06 07:56:55 EDT 2015

STATUS

editing

approved

#2 by R. H. Hardin at Sun Sep 06 07:56:51 EDT 2015

NAME

allocated for R. H. Hardin

Number of (4+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.

DATA

0, 12, 1878, 7943, 351513, 3016874, 64650845, 773758878, 10301327801

OFFSET

1,2

COMMENTS

Row 4 of A261942.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A261942.

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin, Sep 06 2015

STATUS

approved

editing

#1 by R. H. Hardin at Sun Sep 06 07:48:52 EDT 2015

NAME

allocated for R. H. Hardin

KEYWORD

allocated

STATUS

approved