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), (1, -1, 0), (1, 0, 0), (1, 1, 1)}.
A150528
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), (1, -1, 0), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =105a(5) =430a(6) =1917a(7) =8344a(8) =38339a(9) =172896a(10) =808947a(11) =3725645a(12) =17647275a(13) =82496002a(14) =394115323a(15) =1862212671a(16) =8953469157a(17) =42647136320a(18) =206057059233a(19) =987669413703
External references
- oeis: A150528