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, 1, -1), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.
A149613
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, 1, -1), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =63a(5) =239a(6) =1051a(7) =4373a(8) =19545a(9) =85189a(10) =387733a(11) =1736045a(12) =8005589a(13) =36495147a(14) =170006871a(15) =785147059a(16) =3686227031a(17) =17192251653a(18) =81223958909a(19) =381743322857
External references
- oeis: A149613