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, 1, -1), (1, 0, 0), (1, 1, 1)}.
A150802
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, 1, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =132a(5) =582a(6) =2606a(7) =11933a(8) =55196a(9) =257982a(10) =1214865a(11) =5756955a(12) =27417831a(13) =131151642a(14) =629612166a(15) =3031971026a(16) =14640323259a(17) =70858496999a(18) =343663807239
External references
- oeis: A150802