# A190862 (b-file synthesized from sequence entry) 0 1 1 2 2 8 3 36 4 174 5 888 6 4716 7 25808 8 144568 9 825030 10 4780176 11 28045860 12 166295716 13 994959560 14 5999349896 15 36420226288 16 222415222446 17 1365445230212 18 8422174103796 19 52168047039764 20 324366739546304 21 2023789526326096