# A320652 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 13 4 45 5 147 6 497 7 1643 8 5490 9 18252 10 60812 11 202364 12 673915 13 2243295 14 7468973 15 24865272 16 82783967 17 275605513 18 917563193 19 3054785032 20 10170143277 21 33858882922 22 112724577088 23 375287739083 24 1249425198725 25 4159643200494 26 13848474406054 27 46104972636634 28 153494780854254