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, 0), (0, -1, 1), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
A149379
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, 0), (0, -1, 1), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =48a(5) =172a(6) =706a(7) =2832a(8) =12049a(9) =51141a(10) =222939a(11) =976370a(12) =4344645a(13) =19437627a(14) =87901333a(15) =399355372a(16) =1828401965a(17) =8404286971a(18) =38855537373a(19) =180251090968a(20) =839994943533
External references
- oeis: A149379