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, 1), (-1, 1, 1), (1, 0, 0), (1, 1, -1)}.
A148763
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, 1), (-1, 1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =29a(5) =84a(6) =374a(7) =1225a(8) =5664a(9) =19968a(10) =94395a(11) =349513a(12) =1674794a(13) =6425660a(14) =31078444a(15) =122470535a(16) =596237427a(17) =2399354545a(18) =11737547791a(19) =48037100858a(20) =235856644518a(21) =978750425364
External references
- oeis: A148763