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, 0), (1, -1, 1), (1, 0, -1), (1, 1, 0)}.
A149274
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, 0), (1, -1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =42a(5) =149a(6) =604a(7) =2335a(8) =9813a(9) =39940a(10) =171681a(11) =722028a(12) =3154730a(13) =13567418a(14) =60004023a(15) =262309602a(16) =1171110162a(17) =5183089316a(18) =23316172437a(19) =104193685265a(20) =471628178813
External references
- oeis: A149274