# A029572 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 0 4 0 5 24 6 144 7 1008 8 8064 9 72576 10 653184 11 7185024 12 86220288 13 1120863744 14 15692092416 15 237124952064 16 3793999233024 17 64497986961408 18 1160963765305344 19 22058311540801536 20 441004037348818944 21 9261084784325197824 22 203743865255154352128 23 4686108900868550098944