# A093304 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 6 5 11 6 23 7 45 8 89 9 172 10 331 11 641 12 1239 13 2405 14 4685 15 9156 16 17955 17 35323 18 69687 19 137804 20 273055 21 541963 22 1077194 23 2143479 24 4269285 25 8509953