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, 0), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
A150293
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, 0), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =23a(4) =94a(5) =391a(6) =1674a(7) =7340a(8) =32810a(9) =148460a(10) =677221a(11) =3113945a(12) =14427443a(13) =67248566a(14) =314944257a(15) =1480937061a(16) =6990005401a(17) =33106706997a(18) =157268520653a(19) =748999807143
External references
- oeis: A150293