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, 0, 0), (0, -1, 1), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
A149791
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, 0, 0), (0, -1, 1), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =83a(5) =365a(6) =1657a(7) =7549a(8) =35121a(9) =164451a(10) =775939a(11) =3683439a(12) =17582295a(13) =84225511a(14) =404946637a(15) =1952821647a(16) =9440800435a(17) =45740148899a(18) =222051378439
External references
- oeis: A149791