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, -1), (1, 1, 1)}.
A150687
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, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =116a(5) =454a(6) =2062a(7) =8818a(8) =40440a(9) =180490a(10) =839139a(11) =3829880a(12) =18006259a(13) =83431017a(14) =395331473a(15) =1852992063a(16) =8832202618a(17) =41748571831a(18) =199975904832a(19) =951307239046
External references
- oeis: A150687