# A259352 (b-file synthesized from sequence entry) 1 1 2 1 3 3 4 10 5 44 6 249 7 1513 8 10002 9 68455 10 482571 11 3470782 12 25391403 13 188353848 14 1414150643 15 10728851795 16 82151290333 17 634203702080 18 4931994064073 19 38607981904156 20 304032521364835