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, 0, 1), (0, -1, 1), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.
A150870
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, 0, 1), (0, -1, 1), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =33a(4) =145a(5) =660a(6) =3070a(7) =14511a(8) =69333a(9) =334079a(10) =1619791a(11) =7892499a(12) =38606071a(13) =189434359a(14) =931906421a(15) =4594112238a(16) =22687930940a(17) =112209639076a(18) =555661162474
External references
- oeis: A150870