# A110707 (b-file synthesized from sequence entry) 1 6 2 24 3 132 4 804 5 5196 6 34872 7 240288 8 1688244 9 12040188 10 86892384 11 633162360 12 4650680640 13 34390540320 14 255773538240 15 1911730760832 16 14350853162676 17 108139250403804 18 817629606524112 19 6200696697358344 20 47152195812692664