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, -1, 1), (-1, 0, 0), (1, -1, 0), (1, 1, 0)}.
A149514
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, -1, 1), (-1, 0, 0), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =11a(4) =49a(5) =145a(6) =617a(7) =2079a(8) =8793a(9) =31531a(10) =134063a(11) =498625a(12) =2133029a(13) =8136567a(14) =34981371a(15) =135983507a(16) =586987993a(17) =2315546863a(18) =10028372567a(19) =40027472019a(20) =173831418843a(21) =700557970309
External references
- oeis: A149514