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, 0, 0), (0, 1, 0), (1, -1, 0)}.
A148117
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, 0, 0), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =26a(6) =70a(7) =195a(8) =586a(9) =1662a(10) =5068a(11) =15965a(12) =50052a(13) =157178a(14) =513731a(15) =1686164a(16) =5537693a(17) =18364576a(18) =62042980a(19) =210460928a(20) =712129270a(21) =2441118300a(22) =8465730672a(23) =29229162000a(24) =101493128823a(25) =356292793377
External references
- oeis: A148117