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, 0, 0), (0, 0, 1), (1, -1, -1), (1, 1, 0)}.
A150165
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, 0, 0), (0, 0, 1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =75a(5) =289a(6) =1153a(7) =4742a(8) =19899a(9) =84806a(10) =365468a(11) =1591554a(12) =6991967a(13) =30940027a(14) =137761122a(15) =616680344a(16) =2773645233a(17) =12527371702a(18) =56790990386a(19) =258307385503
External references
- oeis: A150165