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, 0), (1, 0, 0), (1, 1, 1)}.
A150494
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, 0), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =101a(5) =400a(6) =1691a(7) =7100a(8) =30813a(9) =133036a(10) =588155a(11) =2590211a(12) =11583491a(13) =51696778a(14) =233377089a(15) =1051874133a(16) =4781266271a(17) =21715428546a(18) =99268577519a(19) =453558890401
External references
- oeis: A150494