coeffs:=
[ 0, 26/47, -1/2, 11/940, 20/47, 0, 0, 0, -3, -171/1504, -13/47, 7/3008, -30/47,
-1/2, 6/235, 1, 5/4, 3, -1/4, 4175/3008, -5/2, -1/47 ]
;
