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, 1), (-1, 1, 1), (1, -1, 0), (1, 0, -1), (1, 0, 0)}.
A148910
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, 1), (-1, 1, 1), (1, -1, 0), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =32a(5) =107a(6) =459a(7) =1745a(8) =7791a(9) =31799a(10) =145590a(11) =621868a(12) =2895091a(13) =12756232a(14) =60094306a(15) =270756085a(16) =1286759098a(17) =5894676721a(18) =28202824567a(19) =130855990876a(20) =629384181850
External references
- oeis: A148910