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, 0), (1, -1, -1), (1, 0, 0)}.
A148517
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, 0), (1, -1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =17a(5) =38a(6) =143a(7) =363a(8) =1408a(9) =3922a(10) =15820a(11) =46805a(12) =191796a(13) =594609a(14) =2486661a(15) =7986637a(16) =33733060a(17) =111492293a(18) =476829005a(19) =1613226513a(20) =6946796857a(21) =23966426413a(22) =104083028616a(23) =365114564090
External references
- oeis: A148517