

A230815


Number of nX4 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)1) mod 3, and upper left element zero


1



0, 0, 12, 174, 816, 12210, 108006, 1202184, 11797696, 124336446, 1262910682, 13078190344, 134042691720, 1381544758264, 14197831448766, 146130421941262, 1502841078520490, 15462124587630982, 159048324563923546
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