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A230687 Number of 3Xn 0..6 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 7, and upper left element zero 1
0, 0, 0, 0, 0, 68, 1500, 18468, 199358, 2097950, 21391538, 214036364, 2120258590, 20866289330, 204450476448, 1997678664888, 19484168217576, 189811510106906, 1847674840583418, 17976598424797564, 174841312778396252 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

COMMENTS

Row 3 of A230686

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..500

CROSSREFS

Sequence in context: A231060 A245875 A329444 * A337962 A231106 A228332

Adjacent sequences:  A230684 A230685 A230686 * A230688 A230689 A230690

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 27 2013

STATUS

approved

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Last modified September 23 12:43 EDT 2021. Contains 347617 sequences. (Running on oeis4.)