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, 1), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.
A149311
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, 1), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =48a(5) =179a(6) =803a(7) =3347a(8) =15405a(9) =67615a(10) =316818a(11) =1433550a(12) =6798291a(13) =31384353a(14) =150127852a(15) =702876838a(16) =3383981344a(17) =16008320227a(18) =77451059648a(19) =369297451020
External references
- oeis: A149311