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, 1), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
A150825
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, 1), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =144a(5) =625a(6) =3003a(7) =13751a(8) =67091a(9) =315700a(10) =1553107a(11) =7428887a(12) =36724963a(13) =177543086a(14) =880396568a(15) =4287319263a(16) =21303598888a(17) =104287619569a(18) =518944314722
External references
- oeis: A150825