Seidel Surface

The Coefficient Order is as follows:

1 -> W000 2 -> W200 3 -> W111 4 -> W020 5 -> W311 6 -> W220 7 -> W131 8 -> W400 9 -> W222 10 -> W040 11 -> W331 12 -> W511 13 -> W420 14 -> W422 15 -> W240 16 -> W242 17 -> W151 18 -> W600 19 -> W333 20 -> W060