Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (-1, 1, -1), (0, 0, -1), (1, 0, 1)}.
A149116
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (-1, 1, -1), (0, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =32a(5) =101a(6) =341a(7) =1237a(8) =4356a(9) =16205a(10) =60807a(11) =228181a(12) =885776a(13) =3410715a(14) =13354484a(15) =52830973a(16) =208725094a(17) =836808429a(18) =3358002345a(19) =13541119833a(20) =55050460354a(21) =223785876151a(22) =915759686472
External references
- oeis: A149116