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, 1, -1), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.
A149537
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, 1, -1), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =49a(5) =177a(6) =667a(7) =2543a(8) =10041a(9) =39539a(10) =158603a(11) =639927a(12) =2607159a(13) =10666927a(14) =43932533a(15) =181850695a(16) =755611295a(17) =3151697829a(18) =13194669577a(19) =55399106349a(20) =233230763877a(21) =984474496333
External references
- oeis: A149537