searching for +/-1 sequences

[Mitchell Harris]

On Thu, 20 Jan 2005, Eric W. Weisstein wrote:

>Perhaps a dumb question, but how do I search OEIS for sequences containing
>a given sequence of +1 and -1s?  If I use superseeker, it matches every
>sequence in which the *absolute value* of the terms is 1.  If I try to do
>a word search on OEIS including minus signs (e.g., "-1,-1") I get no hits.
>If I just search for 1,1,1,1,1,..., I get a maximum of 30 hits, so I have 
>no guarantee that just because I don't *see* my sequence in the 30 
>returned, mine isn't #31.
>
>Concrete example: is the following sequence in OEIS or not (it arises from
>Gauss's generalization of Wilson's theorem)?
>
>-1, -1, -1, -1, -1, -1, 1, -1, -1, -1, 1, -1, -1, 1, 1, -1, -1, -1, 1, 1,
>-1, -1, 1, -1, -1, -1, 1, -1, 1, -1, 1, 1, -1, 1, 1, -1, -1, 1, 1, -1, 1,
>-1, 1, 1, -1, -1, 1, -1, -1, 1, 1, -1, -1, 1, 1, 1, -1, -1, 1, -1, -1, 1,
>1, 1, 1, -1, 1, 1, 1, -1, 1, -1, -1, 1, 1, 1, 1, -1, 1, -1, -1, -1, 1, 1,
>-1, 1, 1, -1, 1, 1, 1, 1, -1, 1, 1, -1, -1, 1, 1
>
>If it is, how do I actually find that out besides downloading the entire 
>database and searching it myself?  I checked but didn't see this in the 
>FAQ.

This is not exactly what you're looking for but it may give some leads:

do the transformation (a(n) + 1)/2. turns it into a 0,1 sequence and
searching I get A011675 and A011731.

Mitch