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, -1, 0), (1, 0, -1), (1, 1, 1)}.
A149764
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, -1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =73a(5) =299a(6) =1265a(7) =5435a(8) =23641a(9) =103813a(10) =460001a(11) =2052807a(12) =9213259a(13) =41554885a(14) =188228345a(15) =855734883a(16) =3902932219a(17) =17852219099a(18) =81867457369a(19) =376297840835
External references
- oeis: A149764