# A209937 (b-file synthesized from sequence entry) 1 1 2 2 3 14 4 164 5 2692 6 56832 7 1466656 8 44735392 9 1574507104 10 62807331520 11 2800211567936 12 137988945383808 13 7447519816062848 14 436913348544200192 15 27682538499602786816 16 1883880221782019929088 17 137046014280583363879936 18 10612885049611654523670528