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, 1), (-1, 1, 1), (1, 0, -1), (1, 1, 0)}.
A148752
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, 1), (-1, 1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =28a(5) =77a(6) =323a(7) =1027a(8) =4499a(9) =15234a(10) =68652a(11) =244482a(12) =1119699a(13) =4128033a(14) =19132050a(15) =72551151a(16) =339255496a(17) =1313734573a(18) =6186905395a(19) =24392958836a(20) =115515119719a(21) =461965418939
External references
- oeis: A148752