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, 0), (-1, 0, 0), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.
A150391
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, 0), (-1, 0, 0), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =89a(5) =355a(6) =1419a(7) =5945a(8) =25173a(9) =108323a(10) =474325a(11) =2089856a(12) =9325373a(13) =41890594a(14) =189466107a(15) =862964951a(16) =3948140988a(17) =18162054954a(18) =83889968239a(19) =388973082359
External references
- oeis: A150391