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, -1, 1), (0, 1, -1), (1, 1, 0)}.
A148986
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, -1, 1), (0, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =32a(5) =116a(6) =433a(7) =1722a(8) =6768a(9) =27864a(10) =114906a(11) =482856a(12) =2051402a(13) =8779365a(14) =37984161a(15) =164983753a(16) =723206092a(17) =3179353568a(18) =14074287365a(19) =62502008249a(20) =278853312329
External references
- oeis: A148986