# A357242 (b-file synthesized from sequence entry) 4 24 5 240 6 2240 7 21840 8 228480 9 2580480 10 31449600 11 412473600 12 5801241600 13 87178291200 14 1394852659200 15 23683435776000 16 425430061056000 17 8062248370176000 18 160770717499392000 19 3365514444644352000 20 73798027581358080000 21 1691677863018823680000 22 40464026199993876480000