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, -1), (-1, -1, 1), (0, 1, -1), (0, 1, 0), (1, 0, 0)}.
A149822
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, -1), (-1, -1, 1), (0, 1, -1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =28a(5) =80a(6) =263a(7) =895a(8) =2980a(9) =10574a(10) =38446a(11) =137922a(12) =517383a(13) =1968961a(14) =7397211a(15) =28703778a(16) =112553640a(17) =436450450a(18) =1734871068a(19) =6950344298a(20) =27575805457a(21) =111606728461a(22) =454473446902
External references
- oeis: A149822