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, 1), (0, 0, -1), (1, 0, 0), (1, 1, 0)}.
A150428
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, 1), (0, 0, -1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =97a(5) =391a(6) =1672a(7) =7232a(8) =32095a(9) =143890a(10) =654576a(11) =3001579a(12) =13885346a(13) =64649472a(14) =302799239a(15) =1425079734a(16) =6737118346a(17) =31968585995a(18) =152210064193a(19) =726892427717
External references
- oeis: A150428