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, 1, 1), (1, -1, 1), (1, 0, 0)}.
A148278
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, 1, 1), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =15a(5) =40a(6) =166a(7) =515a(8) =2241a(9) =7481a(10) =33428a(11) =117409a(12) =534598a(13) =1951131a(14) =9007452a(15) =33852509a(16) =157910004a(17) =607326940a(18) =2855494418a(19) =11189286399a(20) =52936114932a(21) =210652076234
External references
- oeis: A148278