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, -1), (1, 1, 1)}.
A149463
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, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =52a(5) =190a(6) =760a(7) =2911a(8) =11644a(9) =45526a(10) =182104a(11) =719158a(12) =2876632a(13) =11420476a(14) =45681904a(15) =181897393a(16) =727589572a(17) =2902122838a(18) =11608491352a(19) =46350498442a(20) =185401993768a(21) =740747412928
External references
- oeis: A149463