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, 1, 1), (1, 0, -1), (1, 1, -1), (1, 1, 1)}.
A149753
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, 1, 1), (1, 0, -1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =83a(5) =321a(6) =1591a(7) =6703a(8) =33373a(9) =147727a(10) =736945a(11) =3364931a(12) =16801887a(13) =78306089a(14) =391203703a(15) =1849547589a(16) =9242836257a(17) =44158627031a(18) =220716999275
External references
- oeis: A149753