a(n,m) tabl head (triangle) for  A127677
 
Coefficient table of scaled Chebyshev 2*T(2*n,x) polynomials, 
increasing even scaled powers, without zeros. 


   n\m     0      1       2       3        4       5       6      7      8    9 ...

   0       2      0       0       0        0       0       0      0      0    0
   1      -2      1       0       0        0       0       0      0      0    0
   2       2     -4       1       0        0       0       0      0      0    0
   3      -2      9      -6       1        0       0       0      0      0    0
   4       2    -16      20      -8        1       0       0      0      0    0
   5      -2     25     -50      35      -10       1       0      0      0    0
   6       2    -36     105    -112       54     -12       1      0      0    0
   7      -2     49    -196     294     -210      77     -14      1      0    0
   8       2    -64     336    -672      660    -352     104    -16      1    0
   9      -2     81    -540    1386    -1782    1287    -546    135    -18    1
   .
   .
   .

   2*T(2*n,x) = sum(a(n,m)*(2*x)^(2*m),m=0..n).

   Row sums (signed):  -A061347(n+3),n>=0: periodic [2,-1,-1] sequence with period 3.
   Row sums (unsigned):  A005248(n)=L(2*n) (Lucas numbers with even index).


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