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, 0, 0), (0, -1, 1), (0, 1, 0), (1, 1, -1)}.
A148143
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, 0, 0), (0, -1, 1), (0, 1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =29a(6) =86a(7) =259a(8) =813a(9) =2624a(10) =8625a(11) =28963a(12) =98574a(13) =340054a(14) =1186705a(15) =4179149a(16) =14852005a(17) =53163212a(18) =191594122a(19) =694672103a(20) =2531984454a(21) =9274549301a(22) =34120379194a(23) =126031251666a(24) =467241100691
External references
- oeis: A148143