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), (0, 1, 1), (1, -1, 0), (1, 0, 1)}.
A150240
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), (0, 1, 1), (1, -1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =83a(5) =332a(6) =1373a(7) =5822a(8) =25179a(9) =110499a(10) =491055a(11) =2204416a(12) =9982420a(13) =45535322a(14) =209028193a(15) =964872868a(16) =4475498448a(17) =20848734247a(18) =97495290610a(19) =457494977005
External references
- oeis: A150240