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, 0, 0), (0, -1, 1), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
A150850
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, 0, 0), (0, -1, 1), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =140a(5) =624a(6) =2835a(7) =13083a(8) =60972a(9) =286915a(10) =1358879a(11) =6471544a(12) =30958497a(13) =148639296a(14) =715975304a(15) =3458054422a(16) =16742032860a(17) =81223525103a(18) =394774557700
External references
- oeis: A150850