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, 0, 0), (1, 0, -1), (1, 1, 0), (1, 1, 1)}.
A150927
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, 0, 0), (1, 0, -1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =33a(4) =151a(5) =632a(6) =2968a(7) =13118a(8) =62468a(9) =284767a(10) =1367821a(11) =6357302a(12) =30720500a(13) =144677173a(14) =702215475a(15) =3338636698a(16) =16259430258a(17) =77857657542a(18) =380186209037
External references
- oeis: A150927