# A147366 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 1 5 1 6 1 7 4 8 7 9 18 10 27 11 60 12 127 13 520 14 1313 15 5577 16 14738 17 65753 18 214371 19 1292619 20 5259696 21 36901354 22 169889413 23 1338225681 24 7299428688