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, 0, 0), (1, -1, 1), (1, 0, 1), (1, 1, 0)}.
A150501
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, 0, 0), (1, -1, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =102a(5) =403a(6) =1713a(7) =7182a(8) =31386a(9) =135608a(10) =602264a(11) =2654258a(12) =11926855a(13) =53294536a(14) =241519429a(15) =1089964398a(16) =4972116229a(17) =22612082186a(18) =103690698286a(19) =474386571094
External references
- oeis: A150501