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), (0, 0, 1), (1, 0, 0), (1, 1, 1)}.
A151116
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), (0, 0, 1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =45a(4) =193a(5) =851a(6) =3821a(7) =17453a(8) =80579a(9) =375138a(10) =1758875a(11) =8296784a(12) =39321052a(13) =187100167a(14) =893475877a(15) =4279820444a(16) =20554344461a(17) =98946470587a(18) =477328979014
External references
- oeis: A151116