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, 0, 1), (-1, 1, 0), (1, -1, 0), (1, 1, -1), (1, 1, 0)}.
A149391
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, 0, 1), (-1, 1, 0), (1, -1, 0), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =50a(5) =180a(6) =790a(7) =3154a(8) =14290a(9) =60346a(10) =279170a(11) =1222738a(12) =5736673a(13) =25761025a(14) =122079527a(15) =558188720a(16) =2665018568a(17) =12351298823a(18) =59309689625a(19) =277763085700
External references
- oeis: A149391