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), (0, 0, 1), (1, 0, -1), (1, 0, 0)}.
A150147
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), (0, 0, 1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =73a(5) =286a(6) =1171a(7) =4930a(8) =21176a(9) =92591a(10) =411017a(11) =1846504a(12) =8372732a(13) =38262960a(14) =176083803a(15) =815325551a(16) =3795021644a(17) =17743531775a(18) =83289442421a(19) =392377483784
External references
- oeis: A150147