# A148448 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 17 5 50 6 171 7 567 8 1986 9 7141 10 25885 11 96335 12 361948 13 1377016 14 5303325 15 20571802 16 80572919 17 317654987 18 1260703066 19 5033962911 20 20202671783 21 81492060501 22 330138308530 23 1342982590056 24 5483760216426 25 22469085384921 26 92364016812169 27 380813151198233 28 1574483590304631 29 6526707421820414