# A058757 (b-file synthesized from sequence entry) 1 1 2 3 3 7 4 23 5 61 6 207 7 631 8 2111 9 6901 10 23183 11 77749 12 263807 13 896403 14 3063147 15 10493077 16 36060927 17 124198397 18 428708475 19 1482448439 20 5134798223 21 17811210781 22 61864011135 23 215127430973 24 748898387039 25 2609615501811 26 9101687173595