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), (-1, 1, -1), (0, 1, 1), (1, -1, 0)}.
A148344
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), (-1, 1, -1), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =39a(6) =127a(7) =405a(8) =1330a(9) =4478a(10) =15574a(11) =54337a(12) =194625a(13) =699722a(14) =2558633a(15) =9423633a(16) =35049948a(17) =131371020a(18) =495572962a(19) =1882605608a(20) =7196722963a(21) =27626157357a(22) =106690061753a(23) =413630954817
External references
- oeis: A148344