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, 0), (1, 0, 1), (1, 1, 1)}.
A151174
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, 0), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =49a(4) =219a(5) =971a(6) =4499a(7) =20679a(8) =97652a(9) =458010a(10) =2187664a(11) =10392377a(12) =50018335a(13) =239690199a(14) =1159912997a(15) =5593476880a(16) =27178383256a(17) =131685711649a(18) =641876232929
External references
- oeis: A151174