# A147511 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 9 9 15 10 29 11 57 12 137 13 413 14 1389 15 4485 16 15371 17 54209 18 224739 19 1032991 20 5497929 21 29140255 22 171761393 23 1058704295 24 7315438183