Possibly more errors in OEIS?

[franktaw at netscape.net]

Looking at sequences with keyword:cons, there is a marked shortage of 
sequences with a given duplicate digit (excluding 0), compared with 
those with a given other pair of digits.  For example, restricting our 
attention to sequences not of the form "Decimal expansion of 1/n", and 
ignoring all pairs involving 0 or 1, there are an average of about 1710 
sequences  with any given digit pair, but an average of only about 1627 
with duplicate pairs.  10 of this difference is explained by the 10 
"selvage" sequences, which have no duplicate digits, but the rest is 
unexplained.

I'm guessing that there may be an input error here; that duplicate 
digits sometimes get combined at some point in the process, whether 
before or after submission.  I'm not sure how to test for this, short 
of examining the "cons" sequences and determining which are correct.

Mostly for Neil,

Sequences A081780 to A081796, "continued cotangent" sequences, all have 
the "cons" keyword, but they should not.

Also, sequence A114721 has the "cons" keyword; it should instead have 
the "frac" keyword.

Franklin T. Adams-Watters

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