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), (0, 1, 0), (1, -1, 0)}.
A149867
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), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =13a(4) =40a(5) =134a(6) =467a(7) =1681a(8) =6230a(9) =23698a(10) =91781a(11) =361474a(12) =1444421a(13) =5838953a(14) =23855627a(15) =98385021a(16) =409057415a(17) =1713260510a(18) =7223645090a(19) =30637979060a(20) =130649823315a(21) =559905201444
External references
- oeis: A149867