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), (0, 0, 1), (1, 0, -1), (1, 1, 1)}.
A150800
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), (0, 0, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =132a(5) =572a(6) =2556a(7) =11590a(8) =53274a(9) =247116a(10) =1155708a(11) =5438373a(12) =25727190a(13) =122243488a(14) =583041602a(15) =2789802878a(16) =13386825115a(17) =64395596609a(18) =310446453418
External references
- oeis: A150800