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, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.
A148115
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, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =30a(6) =89a(7) =292a(8) =979a(9) =3400a(10) =12343a(11) =45414a(12) =171339a(13) =658069a(14) =2563330a(15) =10148718a(16) =40637220a(17) =164466898a(18) =672375792a(19) =2772055955a(20) =11523056929a(21) =48249869722a(22) =203337220125a(23) =862137480843
External references
- oeis: A148115