# A217647 (b-file synthesized from sequence entry) 1 0 2 1 3 2 4 3 5 6 6 12 7 15 8 20 9 21 10 44 11 54 12 75 13 102 14 116 15 182 16 288 17 326 18 344 19 357 20 458 21 1296 22 2394 23 2913 24 4749 25 6834 26 10425 27 17448