# A259808 (b-file synthesized from sequence entry) 1 4 2 14 3 56 4 226 5 958 6 4052 7 17508 8 75634 9 330804 10 1448830 11 6397288 12 28293338 13 125845174 14 560617586 15 2507890716 16 11234741560 17 50489990570 18 227190742034 19 1024878998006 20 4628430595232