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, 0, 0), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.
A150767
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, 0, 0), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =127a(5) =551a(6) =2452a(7) =11147a(8) =51307a(9) =238818a(10) =1120969a(11) =5298162a(12) =25179300a(13) =120237558a(14) =576398807a(15) =2772530424a(16) =13374884306a(17) =64683710330a(18) =313515943651
External references
- oeis: A150767