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), (1, -1, 0), (1, 0, -1), (1, 1, 1)}.
A149604
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), (1, -1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =61a(5) =231a(6) =963a(7) =3883a(8) =16603a(9) =69357a(10) =301579a(11) =1289895a(12) =5675515a(13) =24684299a(14) =109567115a(15) =482388707a(16) =2156180879a(17) =9580954187a(18) =43072169001a(19) =192787715153a(20) =870874751157
External references
- oeis: A149604