[seqfan] Re: Sequence with a strange for OEIS conjecture

[franktaw at netscape.net]

I don't know that that's true. I think it's just that such sequences 
are relatively rare; usually, you can either find a non-integer value 
or prove that all terms are integers fairly easily.

Franklin T. Adams-Watters

-----Original Message-----
From: D. S. McNeil <dsm054 at gmail.com>

> A year ago, I introduced into OEIS sequence A174531, defined by a 
recursion,
with a strange for OEIS conjecture:  all terms of this sequence are 
integers.  I
wonder
> 1) whether exist other sequences in OEIS with such a strange for OEIS
conjecture?

One reason it's a little unusual is because in general sequences that
aren't known to be integral are disfavoured.  (Yes, there are a fair
number of exceptions, and we can always rescue them by the usual "or
some-number-if-not-integral" or "integral terms generated by.."
tricks, but still.)