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, 1, -1), (0, 1, 1), (1, 0, 1), (1, 1, 0)}.
A151144
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, 1, -1), (0, 1, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =47a(4) =203a(5) =918a(6) =4198a(7) =19533a(8) =91613a(9) =433404a(10) =2061712a(11) =9857055a(12) =47311565a(13) =227842490a(14) =1100343164a(15) =5326816751a(16) =25841660112a(17) =125593622710a(18) =611391307455
External references
- oeis: A151144