On the notion of "coefficient" (related to A046887).

[Edwin Clark]

On Tue, 31 Jan 2006, Giovanni Resta wrote:
> 
> Cy(4)= x^2+1
> 
> According to my personal (and probably erroneous) notion of "coefficient",
> the coefficients of Cy(4) are  1,0,1,  since Cy(4)=1*x^2+0*x+1*1
> 

Note that the code given for the sequence is in Maple and uses the Maple
procedure "coeffs" which gives the nonzero coefficients of a polynomial.

If you allow 0 coefficients, then Cy(1) = x-1 = 0*x^2+x-1 would
also have 0 as a coefficient.