Number of n X 2 0..2 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.

A183547

Number of n X 2 0..2 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.

Terms

    a(0) =3a(1) =15a(2) =71a(3) =299a(4) =1325a(5) =5845a(6) =25785a(7) =113841a(8) =502523a(9) =2218399a(10) =9793287a(11) =43233099a(12) =190855613a(13) =842545925a(14) =3719480233a(15) =16419916497a(16) =72486917979a(17) =319998782959

External references