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, 0), (0, 1, -1), (1, 1, -1), (1, 1, 1)}.
A149763
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, 0), (0, 1, -1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =73a(5) =297a(6) =1253a(7) =5393a(8) =23441a(9) =102615a(10) =454053a(11) =2024967a(12) =9082141a(13) =40939483a(14) =185285179a(15) =841711683a(16) =3837192417a(17) =17544665249a(18) =80427480747a(19) =369547466415
External references
- oeis: A149763