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, 1), (-1, 1, 1), (0, 1, -1), (1, 0, 1)}.
A149265
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, 1), (-1, 1, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =40a(5) =142a(6) =540a(7) =2009a(8) =8017a(9) =31012a(10) =126096a(11) =501651a(12) =2065390a(13) =8376028a(14) =34811593a(15) =143024546a(16) =599037001a(17) =2485562893a(18) =10472855073a(19) =43799101634a(20) =185421645194a(21) =780427538487
External references
- oeis: A149265