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, 1, -1), (1, -1, 1), (1, 0, 0), (1, 1, 1)}.
A150531
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, 1, -1), (1, -1, 1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =107a(5) =446a(6) =2007a(7) =8826a(8) =40717a(9) =184748a(10) =867389a(11) =4016951a(12) =19078567a(13) =89576514a(14) =428852271a(15) =2033468091a(16) =9793501197a(17) =46784585272a(18) =226364034325
External references
- oeis: A150531