The (1,4)-entry in the 4 X 4 matrix M^n, where M={{3, 2, 1, 1}, {2, 1, 1, 0}, {1, 1, 0, 0}, {1, 0, 0, 0}} (n>=0).
A123942
The (1,4)-entry in the 4 X 4 matrix M^n, where M={{3, 2, 1, 1}, {2, 1, 1, 0}, {1, 1, 0, 0}, {1, 0, 0, 0}} (n>=0).
Terms
- a(0) =0a(1) =1a(2) =3a(3) =15a(4) =71a(5) =340a(6) =1626a(7) =7778a(8) =37205a(9) =177966a(10) =851280a(11) =4072001a(12) =19477953a(13) =93170570a(14) =445670811a(15) =2131815570a(16) =10197297001a(17) =48777608903a(18) =233322137235
External references
- oeis: A123942