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, -1, 1), (-1, 0, 1), (0, 0, 1), (1, 1, -1)}.
A148374
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, -1, 1), (-1, 0, 1), (0, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =43a(6) =149a(7) =461a(8) =1660a(9) =5517a(10) =20589a(11) =71521a(12) =273554a(13) =982725a(14) =3825252a(15) =14100377a(16) =55646674a(17) =209278507a(18) =835163345a(19) =3192074879a(20) =12855707644a(21) =49794667899a(22) =202085622420a(23) =791540599641
External references
- oeis: A148374