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, 0), (-1, 1, -1), (-1, 1, 1), (1, -1, -1), (1, 1, 1)}.
A149530
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, 0), (-1, 1, -1), (-1, 1, 1), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =11a(4) =55a(5) =167a(6) =811a(7) =2821a(8) =13625a(9) =50809a(10) =246173a(11) =958101a(12) =4659993a(13) =18686581a(14) =91153825a(15) =373735743a(16) =1827361155a(17) =7621127667a(18) =37337909095a(19) =157839116035a(20) =774611283687
External references
- oeis: A149530