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, 0, 1), (1, -1, -1), (1, 0, 0), (1, 1, -1)}.
A148138
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, 0, 1), (1, -1, -1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =28a(6) =90a(7) =268a(8) =915a(9) =2932a(10) =10533a(11) =35993a(12) =133691a(13) =474722a(14) =1807930a(15) =6638026a(16) =25794275a(17) =97001870a(18) =382848116a(19) =1469545267a(20) =5877102305a(21) =22926929344a(22) =92687064938a(23) =366654371191
External references
- oeis: A148138