k =

     1


ans =

1/2-c



k =

     2


ans =

-1/6-c^2+c



k =

     3


ans =

-c^3+3/2*c^2-1/2*c



k =

     4


ans =

1/30-c^4+2*c^3-c^2



k =

     5


ans =

-1/72057594037927936-c^5+5/2*c^4-5/3*c^3+1/6*c



k =

     6


ans =

-1/42-c^6+3*c^5-5/2*c^4+1/2*c^2



k =

     7


ans =

1/72057594037927936-c^7+7/2*c^6-7/2*c^5+7/6*c^3-1/6*c



k =

     8


ans =

1/30-c^8+4*c^7-14/3*c^6+7/3*c^4-2/3*c^2



k =

     9


ans =

1/36028797018963968-c^9+9/2*c^8-6*c^7+21/5*c^5-2*c^3+3/10*c



k =

    10


ans =

-5/66-c^10+5*c^9-15/2*c^8+7*c^6-5*c^4+3/2*c^2



k =

    11


ans =

-1/18014398509481984-c^11+11/2*c^10-55/6*c^9+11*c^7-11*c^5+11/2*c^3-5/6*c



k =

    12


ans =

691/2730-c^12+6*c^11-11*c^10+33/2*c^8-22*c^6+33/2*c^4-5*c^2



k =

    13


ans =

-1/2251799813685248-c^13+13/2*c^12-13*c^11+143/6*c^9-286/7*c^7+429/10*c^5-65/3*c^3+691/210*c



k =

    14


ans =

-7/6-c^14+7*c^13-91/6*c^12+1001/30*c^10-143/2*c^8+1001/10*c^6-455/6*c^4+691/30*c^2