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, 0), (0, 0, 1), (0, 1, 1), (1, 0, -1)}.
A150103
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, 0), (0, 0, 1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =68a(5) =255a(6) =984a(7) =3929a(8) =16013a(9) =66253a(10) =278482a(11) =1183947a(12) =5079517a(13) =21992997a(14) =95913334a(15) =420824859a(16) =1857477019a(17) =8239560040a(18) =36707294405a(19) =164224110552a(20) =737390796048
External references
- oeis: A150103