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, -1)}.
A148852
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, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =28a(5) =91a(6) =339a(7) =1219a(8) =4729a(9) =17967a(10) =72051a(11) =284889a(12) =1168359a(13) =4742941a(14) =19784801a(15) =81931257a(16) =346432579a(17) =1457019579a(18) =6229024211a(19) =26524446504a(20) =114437092724a(21) =492263548721
External references
- oeis: A148852