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, 0), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
A150783
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, 0), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =134a(5) =569a(6) =2628a(7) =11761a(8) =55410a(9) =255462a(10) =1218653a(11) =5721052a(12) =27511880a(13) =130716602a(14) =632222509a(15) =3029641905a(16) =14716411060a(17) =70967847363a(18) =345870276570
External references
- oeis: A150783