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, 1), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
A150519
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, 1), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =103a(5) =430a(6) =1895a(7) =8429a(8) =38455a(9) =176689a(10) =823170a(11) =3855727a(12) =18212344a(13) =86380177a(14) =411945954a(15) =1970859842a(16) =9464998343a(17) =45570229510a(18) =220010368400
External references
- oeis: A150519