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, 0), (0, -1, 1), (0, 1, -1), (0, 1, 1), (1, 1, 1)}.
A150990
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, 0), (0, -1, 1), (0, 1, -1), (0, 1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =37a(4) =167a(5) =758a(6) =3515a(7) =16482a(8) =77891a(9) =370690a(10) =1772577a(11) =8511629a(12) =41009923a(13) =198137332a(14) =959633411a(15) =4657209015a(16) =22642992661a(17) =110261657654a(18) =537679673551
External references
- oeis: A150990