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), (1, 0, -1), (1, 1, -1), (1, 1, 0)}.
A148999
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), (1, 0, -1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =34a(5) =114a(6) =484a(7) =1809a(8) =7983a(9) =32097a(10) =144898a(11) =609838a(12) =2801604a(13) =12159600a(14) =56608738a(15) =251279146a(16) =1181576856a(17) =5336084300a(18) =25285120286a(19) =115751190584a(20) =551839279807
External references
- oeis: A148999