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, 0, 0), (-1, 1, 1), (1, -1, 0), (1, 1, -1), (1, 1, 0)}.
A149393
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, 0, 0), (-1, 1, 1), (1, -1, 0), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =50a(5) =182a(6) =807a(7) =3258a(8) =14877a(9) =63387a(10) =294952a(11) =1300716a(12) =6129517a(13) =27674324a(14) =131595940a(15) =604281169a(16) =2892883029a(17) =13453559074a(18) =64742577763a(19) =304056392684
External references
- oeis: A149393