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, 0), (0, 0, -1), (0, 1, 1), (1, -1, 1)}.
A148860
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, 0), (0, 0, -1), (0, 1, 1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =28a(5) =96a(6) =349a(7) =1294a(8) =4928a(9) =19203a(10) =76086a(11) =305502a(12) =1242251a(13) =5100276a(14) =21134073a(15) =88267969a(16) =371224527a(17) =1571306552a(18) =6688704784a(19) =28618871601a(20) =123033231031a(21) =531189061092
External references
- oeis: A148860