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, -1, 0), (1, 1, 0)}.
A149182
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, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =36a(5) =120a(6) =451a(7) =1626a(8) =6426a(9) =24185a(10) =98084a(11) =381500a(12) =1568582a(13) =6253145a(14) =25945355a(15) =105297818a(16) =440103945a(17) =1809396632a(18) =7609736345a(19) =31591826888a(20) =133555292794a(21) =558736339296
External references
- oeis: A149182