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, 1, 1), (0, 0, -1), (1, -1, 1), (1, 1, 1)}.
A149713
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, 1, 1), (0, 0, -1), (1, -1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =71a(5) =289a(6) =1269a(7) =5529a(8) =24779a(9) =111551a(10) =509963a(11) =2340953a(12) =10839905a(13) =50411789a(14) =235844465a(15) =1107194945a(16) =5219661875a(17) =24680610811a(18) =117075851463a(19) =556728580407
External references
- oeis: A149713