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A263368 Number of (n+1)X(3+1) 0..2 arrays with each row and column divisible by 7, read as a base-3 number with top and left being the most significant digits. 1
2, 7, 82, 865, 9888, 107514, 1260442, 15048493, 180640864, 2167406803, 26004426192, 311958557356, 3743219626994, 44918305209517, 539021844275470, 6468267502547329, 77619174191856096, 931428840572850954 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A263373.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=4

..1..2..1..1....2..2..1..2....0..0..0..0....0..0..2..1....2..1..2..1

..2..2..1..2....0..0..0..0....1..0..2..2....0..2..1..0....1..2..1..1

..1..0..0..1....1..2..1..1....0..0..0..0....2..0..0..2....1..0..0..1

..1..2..1..1....1..0..0..1....0..0..0..0....1..0..2..2....1..1..2..0

..0..2..1..0....1..2..1..1....1..0..2..2....0..2..1..0....2..2..1..2

CROSSREFS

Cf. A263373.

Sequence in context: A071409 A232041 A135756 * A208806 A319144 A111822

Adjacent sequences:  A263365 A263366 A263367 * A263369 A263370 A263371

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 16 2015

STATUS

approved

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Last modified December 2 20:25 EST 2021. Contains 349445 sequences. (Running on oeis4.)