# A049182 (b-file synthesized from sequence entry) 1 1 2 1 3 3 4 9 5 33 6 125 7 501 8 2063 9 8719 10 37531 11 164093 12 726491 13 3250743 14 14676923 15 66780835 16 305908709 17 1409609741 18 6529455069 19 30386379215 20 142002499261 21 666116180157 22 3135363209281 23 14803932109737 24 70097438174979