# A148810 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 8 4 26 5 86 6 305 7 1104 8 4127 9 15865 10 61291 11 242393 12 972891 13 3914605 14 15992813 15 66039145 16 272797057 17 1139731760 18 4799616692 19 20201380611 20 85786198770 21 366534573684 22 1564618416246 23 6727065028303 24 29066076665305 25 125444611684962 26 544649409416965 27 2374412332299237 28 10338463313918359