[seqfan] Meanings

Paolo Lava paoloplava at gmail.com
Tue Dec 13 10:57:49 CET 2011

Dear seqfans,

What to do when the same word is used with different meanings? To take the
oldest definition as the right one or leave all the definitions as they are?

For instance let us take the term “anti-perfect”.

I extensively used it in many sequences (see A192270, A192271, A192275,
A192285, A192288, A192290, A192293) trusting in the definition given by Jon
Perry: integers such that the sum of its anti-divisors equals the original
integers (A073930; the link does not work: see a cached copy on
anti-divisor in http://oeis.org/A066272/a066272a.html)

But if we look at A072228 Joseph L. Pe defines anti-perfect the numbers n
such that n = the sum of the reverses of the proper divisors of n.


Furthermore in a comment to A159907 Jaroslav Krizek writes: “…
multiply-anti-perfect numbers m: m divides antisigma(m) = A024816(m)…”



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