# A324844 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 3 5 7 6 13 7 32 8 71 9 170 10 406 11 1002 12 2469 13 6204 14 15644 15 39871 16 102116 17 263325 18 682079 19 1775600 20 4640220