A165384 - OEIS

A165384

Number of slanted nX7 (i=1..n)X(j=i..7+i-1) 1..4 arrays with all 1s connected, all 2s connected, all 3s connected, all 4s connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, 4 in the lower right corner, and with no element having more than 3 neighbors with the same value

481, 18912, 196082, 1357468, 7051772, 30346872, 113675050, 385459632, 1210822319, 3585582454, 10137294012

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OFFSET

2,1

LINKS

Table of n, a(n) for n=2..12.

EXAMPLE

One solution for n=6

...1.1.2.2.2.2.2..........

.....1.1.2.3.2.2.2........

.......1.3.3.2.3.2.2......

.........3.3.2.3.3.4.4....