# A099387 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 7 5 24 6 46 7 138 8 507 9 1466 10 3641 11 4806 12 106716 13 301330 14 1173587 15 1771791 16 7868294 17 156060995 18 8126341146 19 64642714833 20 292435587912 21 586597464339 22 1138023523395 23 2232671126262 24 21006004690614 25 28738943640898 26 570863391802477 27 88656067576349103