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, 1, 1)}.
A149596
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, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =59a(5) =219a(6) =943a(7) =3751a(8) =15899a(9) =67527a(10) =294375a(11) =1259641a(12) =5562709a(13) =24487903a(14) =108724571a(15) =481848287a(16) =2168462967a(17) =9716498853a(18) =43820690213a(19) =197919279247a(20) =899976839611
External references
- oeis: A149596