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, 0, 0), (0, -1, 0), (0, 1, -1), (1, 1, 0)}.
A149173
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, 0, 0), (0, -1, 0), (0, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =34a(5) =116a(6) =414a(7) =1520a(8) =5801a(9) =22425a(10) =88356a(11) =354015a(12) =1436161a(13) =5883984a(14) =24364534a(15) =101756744a(16) =428049139a(17) =1812818242a(18) =7726376444a(19) =33107102100a(20) =142560071609a(21) =616726081964
External references
- oeis: A149173