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, 0, 0), (1, -1, 0), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
A150410
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, 0, 0), (1, -1, 0), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =94a(5) =370a(6) =1537a(7) =6440a(8) =27736a(9) =120438a(10) =531524a(11) =2362294a(12) =10610448a(13) =47937526a(14) =218192951a(15) =997960740a(16) =4589673468a(17) =21193599950a(18) =98284832446a(19) =457341091934
External references
- oeis: A150410