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A263872 Number of (n+1)X(7+1) 0..1 arrays with each row and column divisible by 3, read as a binary number with top and left being the most significant bits, and rows and columns lexicographically nondecreasing. 1
5, 5, 25, 41, 494, 2909, 62904, 525967, 8468941, 71260394, 850301770, 6589670154, 62160939006, 434482926964, 3416830587073, 21593530137906, 146883022822593, 846348872934578, 5108443008090443, 27076148532186899, 147708619212786406 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A263873.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..60

EXAMPLE

Some solutions for n=4

..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0

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

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

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

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

CROSSREFS

Cf. A263873.

Sequence in context: A154630 A245520 A245130 * A237654 A038247 A263798

Adjacent sequences:  A263869 A263870 A263871 * A263873 A263874 A263875

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 28 2015

STATUS

approved

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Last modified September 29 01:05 EDT 2022. Contains 357082 sequences. (Running on oeis4.)