# A326793 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 12 5 30 6 75 7 188 8 472 9 1186 10 2981 11 7494 12 18842 13 47376 14 119126 15 299545 16 753220 17 1894018 18 4762640 19 11976010 20 30114592 21 75725485 22 190417684 23 478820320 24 1204031670 25 3027633300 26 7613224740 27 19144059492 28 48139261637 29 121050006438