# A148453 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 17 5 53 6 181 7 629 8 2273 9 8442 10 31903 11 123276 12 482016 13 1909749 14 7671004 15 31041259 16 126847637 17 522862741 18 2167729171 19 9053158292 20 38026043662 21 160503188086 22 681190257778 23 2902953020464 24 12422813296300 25 53381627069382 26 230129554758325 27 995583076288227 28 4320678366122981