# A090520 (b-file synthesized from sequence entry) 1 5 2 7 3 43 4 769 5 1123 6 52631 7 1428571 8 2127659 9 14925373 10 769230769 11 5882352941 12 6369426751 13 588235294117 14 319488817891 15 9345794392523 16 24449877750611 17 662251655629139 18 1293661060802069 19 67114093959731543 20 244498777506112469