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, 0, 1), (1, -1, -1), (1, 1, -1), (1, 1, 1)}.
A149629
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, 0, 1), (1, -1, -1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =67a(5) =253a(6) =1141a(7) =4761a(8) =21809a(9) =95305a(10) =442943a(11) =1990835a(12) =9349689a(13) =42816329a(14) =202700861a(15) =940879693a(16) =4482056645a(17) =21014667355a(18) =100605549821a(19) =475410418383
External references
- oeis: A149629