|   | 1 |  initial version  | 
Does the following help (if not, ask for more) ?
sage: for beta in srange(0.91,0.99,0.02):
....:     print n-beta*n-1
....:     
89.0000000000000
69.0000000000000
48.9999999999999
28.9999999999999
a numerical noise that can be fixed as follows:
sage: for beta in srange(0.91,0.99,0.02):
....:     print round(n-beta*n-1)
89
69
49
29
 Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.
 
                
                Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.