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, -1), (-1, -1, 1), (-1, 1, 0), (0, 1, -1), (1, 0, 1)}.
A148843
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, -1), (-1, -1, 1), (-1, 1, 0), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =27a(5) =95a(6) =318a(7) =1216a(8) =4572a(9) =17233a(10) =67516a(11) =267865a(12) =1059018a(13) =4251626a(14) =17287544a(15) =70360191a(16) =287710744a(17) =1188208755a(18) =4923026388a(19) =20420750812a(20) =85249374158a(21) =357241170401
External references
- oeis: A148843