Number of lower triangles of a 6 X 6 0..n array with no element differing from any of its horizontal or vertical neighbors by more than one.

A194935

Number of lower triangles of a 6 X 6 0..n array with no element differing from any of its horizontal or vertical neighbors by more than one.

Terms

    a(0) =2097152a(1) =43337009a(2) =136403494a(3) =248381815a(4) =364130672a(5) =480403525a(6) =596729942a(7) =713059915a(8) =829390016a(9) =945720119a(10) =1062050222a(11) =1178380325a(12) =1294710428a(13) =1411040531a(14) =1527370634a(15) =1643700737a(16) =1760030840a(17) =1876360943a(18) =1992691046

External references