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, 0), (0, 0, -1), (0, 1, 1), (1, -1, 0)}.
A148795
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, 0), (0, 0, -1), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =25a(5) =83a(6) =291a(7) =995a(8) =3692a(9) =13749a(10) =52092a(11) =197992a(12) =776472a(13) =3033239a(14) =12060694a(15) =48059035a(16) =194129217a(17) =783582043a(18) =3204105093a(19) =13101063246a(20) =54049360911a(21) =223067313311a(22) =928418371314
External references
- oeis: A148795