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, 1), (0, 0, 1), (1, -1, 1), (1, 1, -1)}.
A148424
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, 1), (0, 0, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =18a(5) =59a(6) =235a(7) =893a(8) =3810a(9) =15513a(10) =68355a(11) =291633a(12) =1316392a(13) =5780793a(14) =26499220a(15) =118934221a(16) =551889602a(17) =2515299167a(18) =11775715141a(19) =54333877955a(20) =256237560742
External references
- oeis: A148424