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, 1, 0), (1, -1, 0), (1, 1, -1), (1, 1, 0)}.
A149213
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, 1, 0), (1, -1, 0), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =42a(5) =133a(6) =583a(7) =2107a(8) =9498a(9) =37100a(10) =170422a(11) =700327a(12) =3260691a(13) =13885192a(14) =65303709a(15) =285469307a(16) =1353084601a(17) =6034100741a(18) =28777781725a(19) =130354698204a(20) =624801809350
External references
- oeis: A149213