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), (1, -1, -1), (1, 1, 1)}.
A149526
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), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =11a(4) =51a(5) =159a(6) =751a(7) =2595a(8) =12379a(9) =45945a(10) =220889a(11) =854271a(12) =4130823a(13) =16478877a(14) =80029233a(15) =326453435a(16) =1590666183a(17) =6603678257a(18) =32262733253a(19) =135823875601a(20) =664990841141
External references
- oeis: A149526