The (1,3)-entry in the matrix M^n, where M is the 3 X 3 matrix [0,2,1; 2,1,2; 1,2,2] (n>=1).

A120758

The (1,3)-entry in the matrix M^n, where M is the 3 X 3 matrix [0,2,1; 2,1,2; 1,2,2] (n>=1).

Terms

    a(0) =1a(1) =6a(2) =25a(3) =116a(4) =517a(5) =2338a(6) =10517a(7) =47400a(8) =213481a(9) =961726a(10) =4332145a(11) =19515036a(12) =87908397a(13) =395998298a(14) =1783838637a(15) =8035595600a(16) =36197658961a(17) =163058307446a(18) =734522939465

External references