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, 0, -1), (-1, 0, 1), (1, -1, 1), (1, 1, 0)}.
A149207
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, 0, -1), (-1, 0, 1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =40a(5) =129a(6) =549a(7) =1933a(8) =8502a(9) =31708a(10) =142109a(11) =549108a(12) =2494264a(13) =9891529a(14) =45352455a(15) =183421419a(16) =847068443a(17) =3478366440a(18) =16154265409a(19) =67150019188a(20) =313261541733
External references
- oeis: A149207