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), (-1, 1, 0), (1, 0, 0), (1, 0, 1)}.
A150666
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), (-1, 1, 0), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =24a(4) =102a(5) =353a(6) =1587a(7) =5924a(8) =27262a(9) =106387a(10) =498123a(11) =2005025a(12) =9489971a(13) =39050286a(14) =186317796a(15) =779778190a(16) =3742856419a(17) =15874268538a(18) =76548900084a(19) =328182985338
External references
- oeis: A150666