Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,1,4,2 for x=0,1,2,3,4.

A196295

Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,1,4,2 for x=0,1,2,3,4.

Terms

    a(0) =4a(1) =20a(2) =58a(3) =290a(4) =1201a(5) =4988a(6) =21344a(7) =90150a(8) =381754a(9) =1621695a(10) =6890299a(11) =29235310a(12) =124148208a(13) =527208582a(14) =2238746157a(15) =9507860508a(16) =40379986769a(17) =171493157818a(18) =728338492990

External references