# A158455 (b-file synthesized from sequence entry) 1 5 2 18 3 104 4 816 5 8064 6 96000 7 1336320 8 21288960 9 381911040 10 7617576960 11 167215104000 12 4005730713600 13 103985499340800 14 2907670000435200 15 87128076504268800 16 2785241789890560000 17 94612521108897792000 18 3403308368004120576000 19 129232476659005784064000