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, 0), (-1, 1, 0), (1, 0, 0), (1, 1, 1)}.
A150680
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, 0), (-1, 1, 0), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =114a(5) =421a(6) =1942a(7) =7636a(8) =36057a(9) =147238a(10) =703932a(11) =2947242a(12) =14209822a(13) =60564815a(14) =293793936a(15) =1269162015a(16) =6184264131a(17) =26998026239a(18) =132007657852a(19) =581192391416
External references
- oeis: A150680