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, 0, 0), (0, -1, 0), (0, 1, -1), (1, 1, 1)}.
A149599
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, 0, 0), (0, -1, 0), (0, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =59a(5) =227a(6) =911a(7) =3743a(8) =15495a(9) =65707a(10) =279199a(11) =1204391a(12) =5219705a(13) =22784247a(14) =100120943a(15) =441384835a(16) =1958400515a(17) =8708589669a(18) =38912992787a(19) =174306655367a(20) =783247387381
External references
- oeis: A149599