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Re: Strange 26base enumeration

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  • Subject: [mg111215] Re: Strange 26base enumeration
  • From: dr DanW <dmaxwarren at>
  • Date: Fri, 23 Jul 2010 07:15:44 -0400 (EDT)
  • References: <i293lk$m1e$>

Oooo.  Nice little morning puzzle to wake my brain up.

At first, it looked like an easy solution using IntegerDigits, but ran
into a problem that this isn't a true digit system, in that it does
not have a zero.  I had to add a little logic to deal with that.  Try

ToExcelColumn[n_Integer] := Module[{id},
    id = IntegerDigits[n, 26] //. {pre___, d_, 0, post___} :>
         {pre, d - 1, 26, post} //. {0, post___} :> {post};
     StringJoin[id /. Thread[Range[1, 26] -> CharacterRange["A",

Map this function onto a range starting at 1 and you will get your


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