PermutationGroup<20|
\[2,3,1,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20],
\[1,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,2]
/*order=2^17*3^8*5^4*7^2*11*13*17*19*/>
