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, 0, 0), (0, 1, 0), (1, -1, -1), (1, 1, 1)}.
A150516
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, 0, 0), (0, 1, 0), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =103a(5) =426a(6) =1851a(7) =8108a(8) =36313a(9) =164214a(10) =752101a(11) =3467971a(12) =16108555a(13) =75239742a(14) =353313069a(15) =1666007227a(16) =7885689713a(17) =37449389542a(18) =178386215245a(19) =851949453185
External references
- oeis: A150516