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), (0, 1, 0), (1, -1, 1), (1, 0, -1)}.
A148393
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), (0, 1, 0), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =52a(6) =183a(7) =664a(8) =2449a(9) =9362a(10) =36633a(11) =145270a(12) =586439a(13) =2398743a(14) =9905045a(15) =41348528a(16) =174110004a(17) =738361192a(18) =3154440182a(19) =13559465468a(20) =58601967026a(21) =254620276210
External references
- oeis: A148393