# A030980 (b-file synthesized from sequence entry) 1 1 2 0 3 3 4 4 5 23 6 66 7 280 8 1030 9 4207 10 16852 11 69747 12 289950 13 1222540 14 5192344 15 22239672 16 95864902 17 415730735 18 1812177000 19 7936353049 20 34901789568 21 154067755503 22 682428824890 23 3032173906692 24 13510960371744