# A222201 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 14 5 154 6 1072 7 5320 8 301384 9 4638576 10 49483138 11 13916993782 12 467260456608 13 10754797724124 14 14746957510647992 15 1076226888605605706 16 53540340738182687296 17 354282765498796010420944 18 56126499620491437281263608 19 6040964455632840415885507728 20 191678405883294971709423926242394 21 65882516522625836326159786165530572