# A268394 (b-file synthesized from sequence entry) 1 1 2 3 3 7 4 16 5 35 6 74 7 152 8 313 9 638 10 1287 11 2597 12 5233 13 10512 14 21077 15 42237 16 84565 17 169285 18 338636 19 677457