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, 1), (0, 0, 1), (1, 0, 1), (1, 1, -1)}.
A150442
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, 1), (0, 0, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =101a(5) =405a(6) =1783a(7) =7591a(8) =34639a(9) =153820a(10) =713327a(11) =3237482a(12) =15230172a(13) =70405231a(14) =333866824a(15) =1560489343a(16) =7455980000a(17) =35199306111a(18) =168979773851a(19) =802989918943
External references
- oeis: A150442