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), (0, 0, -1), (0, 0, 1), (0, 1, -1), (1, 0, 1)}.
A150670
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), (0, 0, -1), (0, 0, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =25a(4) =104a(5) =391a(6) =1666a(7) =6881a(8) =29855a(9) =129545a(10) =573055a(11) =2554446a(12) =11501808a(13) =52133192a(14) =238084704a(15) =1092443168a(16) =5042516850a(17) =23364889005a(18) =108739377523a(19) =507833697775
External references
- oeis: A150670