Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,0,3,4 for x=0,1,2,3,4.

A196432

Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,0,3,4 for x=0,1,2,3,4.

Terms

    a(0) =4a(1) =20a(2) =75a(3) =314a(4) =1283a(5) =5311a(6) =21803a(7) =89640a(8) =369032a(9) =1517961a(10) =6244222a(11) =25688677a(12) =105682189a(13) =434759457a(14) =1788546806a(15) =7357898836a(16) =30269531965a(17) =124525282462a(18) =512282735741

External references