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), (0, 0, -1), (0, 0, 1), (0, 1, 1), (1, 1, 0)}.
A151178
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), (0, 0, -1), (0, 0, 1), (0, 1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =50a(4) =219a(5) =983a(6) =4495a(7) =20831a(8) =97495a(9) =459905a(10) =2182892a(11) =10413446a(12) =49885007a(13) =239810963a(14) =1156285326a(15) =5589527618a(16) =27080304481a(17) =131455790797a(18) =639225917752
External references
- oeis: A151178