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

0, 0, 0, 0, 0, 68, 1500, 18468, 199358, 2097950, 21391538, 214036364, 2120258590, 20866289330, 204450476448, 1997678664888, 19484168217576, 189811510106906, 1847674840583418, 17976598424797564, 174841312778396252

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