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, 1, 0), (1, 0, -1), (1, 1, 0)}.
A148605
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, 1, 0), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =21a(5) =53a(6) =197a(7) =568a(8) =2232a(9) =6840a(10) =27846a(11) =90222a(12) =375296a(13) =1259121a(14) =5332794a(15) =18418518a(16) =78879842a(17) =279015843a(18) =1207434736a(19) =4346911083a(20) =18965926422a(21) =69405012659a(22) =304800551773
External references
- oeis: A148605