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, 0, 1), (1, 0, 0), (1, 1, -1)}.
A150206
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, 0, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =80a(5) =325a(6) =1371a(7) =5945a(8) =26322a(9) =118456a(10) =539795a(11) =2485364a(12) =11541204a(13) =53971667a(14) =253912435a(15) =1200681742a(16) =5702732119a(17) =27189790932a(18) =130074587375a(19) =624117990312
External references
- oeis: A150206