[seqfan] Re: Time-Indepenent Schrodinger Equation discrete version

[William Keith]

On Fri, Feb 8, 2013 at 4:53 PM, Ron Hardin <rhhardin at att.net> wrote:
> /tmp/czd
> T(n,k)=Number of -k..k arrays of length n whose elements are some constant times
> the end-around second differences

Could you state your definition more rigorously?  It seems like a
fairly non-artificial sort of object and that columns have period 12
sounds like an interesting and non-obvious property, but I would like
to know precisely what we're looking at.

William Keith