[texhax] package

[Wickes Robbertse]

Good day
 
I'm trying to find a command or package to facilitate actuarial
notation in LaTex, i.e. for an ordinary annuity a_n the n is placed in a
halfbox.
 
Can someone help me or guide me in the right direction
 
Thank you
 
Kind regards
Wickes
 
 
 
 
Wickes Robbertse
Department of Mathematics and Statistics
University of Johannesburg
Aucklandpark Kingsway Campus
P.O. Box 524
Aucklandpark 
2006
South Africa
 
+27-11-489-2861 (tel)
+27-11-489-2832 (fax)
jlr at rau.ac.za 
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