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, 0), (0, 1, 1), (1, 0, -1)}.
A148343
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, 0), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =39a(6) =127a(7) =405a(8) =1318a(9) =4466a(10) =15592a(11) =53968a(12) =193558a(13) =699208a(14) =2540930a(15) =9383647a(16) =34949626a(17) =130634061a(18) =493419324a(19) =1876247580a(20) =7158355193a(21) =27508780199a(22) =106273910202a(23) =411872196856
External references
- oeis: A148343