# A030973 (b-file synthesized from sequence entry) 1 1 2 2 3 7 4 29 5 146 6 879 7 6155 8 49246 9 443222 10 4432226 11 48754489 12 585053875 13 7605700380 14 106479805323 15 1597197079850 16 25555153277608 17 434437605719351 18 7819876902948326 19 148577661156018207 20 2971553223120364157