# A146741 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 1 5 3 6 13 7 35 8 153 9 683 10 3961 11 40313 12 425869 13 5201531 14 83958899 15 1605656621 16 40845335121 17 1341029021439 18 52952035760711 19 2606494713905651 20 160683571908609159