# A219617 (b-file synthesized from sequence entry) 1 2 2 4 3 8 4 10 5 12 6 34 7 50 8 62 9 100 10 128 11 284 12 342 13 984 14 4172 15 4334 16 7004 17 10282 18 15580 19 17442 20 19548 21 21422 22 22528 23 51752