# A098545 (b-file synthesized from sequence entry) 1 1 2 3 3 7 4 21 5 51 6 148 7 365 8 983 9 2461 10 6360 11 15687 12 39757 13 97033 14 240425 15 582622 16 1421273 17 3409861 18 8222920 19 19565707 20 46680362 21 110309476 22 260876036 23 612293443 24 1437616751 25 3354111156 26 7823501148 27 18157700800 28 42112132458