# A050953 (b-file synthesized from sequence entry) 1 7 2 14 3 23 4 33 5 47 6 62 7 69 8 133 9 141 10 167 11 213 12 398 13 413 14 573 15 717 16 1077 17 1293 18 1397 19 1757 20 3053