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), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.
A149941
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), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =15a(4) =49a(5) =170a(6) =623a(7) =2379a(8) =9338a(9) =37576a(10) =154340a(11) =644483a(12) =2730167a(13) =11708543a(14) =50746433a(15) =221991539a(16) =979080091a(17) =4349521487a(18) =19447988041a(19) =87464143114a(20) =395422157116
External references
- oeis: A149941