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, 1), (0, 0, -1), (1, -1, 0), (1, 1, 0)}.
A149270
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, 1), (0, 0, -1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =41a(5) =148a(6) =581a(7) =2298a(8) =9414a(9) =39020a(10) =164742a(11) =702845a(12) =3031984a(13) =13191615a(14) =57837324a(15) =255216761a(16) =1132838932a(17) =5053711738a(18) =22647339728a(19) =101905858689a(20) =460213087530
External references
- oeis: A149270