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, 0), (-1, 0, 1), (-1, 1, 1), (1, 0, 1), (1, 1, -1)}.
A149419
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, 0), (-1, 0, 1), (-1, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =55a(5) =190a(6) =902a(7) =3398a(8) =16472a(9) =65382a(10) =320484a(11) =1312459a(12) =6474503a(13) =27104304a(14) =134256960a(15) =571321161a(16) =2837484435a(17) =12227247005a(18) =60836420112a(19) =264787231957
External references
- oeis: A149419