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, 1, -1), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
A150909
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, 1, -1), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =31a(4) =143a(5) =592a(6) =2744a(7) =12229a(8) =57456a(9) =264057a(10) =1256093a(11) =5879718a(12) =28197652a(13) =133669170a(14) =644905881a(15) =3083604026a(16) =14947599710a(17) =71929119914a(18) =349927981469
External references
- oeis: A150909