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), (0, 1, 1), (1, 0, 0)}.
A150164
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), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =75a(5) =286a(6) =1166a(7) =4780a(8) =20165a(9) =85995a(10) =371460a(11) =1619327a(12) =7120583a(13) =31509317a(14) =140326866a(15) =628064132a(16) =2823902816a(17) =12748912424a(18) =57759405138a(19) =262530017621
External references
- oeis: A150164