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), (-1, 1, -1), (0, 0, 1), (1, 0, -1)}.
A148176
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), (-1, 1, -1), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =28a(6) =86a(7) =238a(8) =774a(9) =2305a(10) =7777a(11) =24868a(12) =85478a(13) =286633a(14) =1004647a(15) =3487183a(16) =12416017a(17) =44263145a(18) =159973682a(19) =581589707a(20) =2131952784a(21) =7868316102a(22) =29213757901a(23) =109116932442a(24) =409785142527
External references
- oeis: A148176