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), (1, -1, 0), (1, -1, 1), (1, 1, 0)}.
A149112
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), (1, -1, 0), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =8a(4) =36a(5) =100a(6) =464a(7) =1468a(8) =6965a(9) =23905a(10) =114844a(11) =416216a(12) =2016743a(13) =7602555a(14) =37059549a(15) =143921898a(16) =704672428a(17) =2801020997a(18) =13760655759a(19) =55729821081a(20) =274505700986
External references
- oeis: A149112