# A026299 (b-file synthesized from sequence entry) 0 1 1 3 2 7 3 19 4 53 5 149 6 422 7 1202 8 3440 9 9884 10 28495 11 82387 12 238801 13 693689 14 2018981 15 5886329 16 17187891 17 50257299 18 147135189 19 431245977 20 1265264799 21 3715761759 22 10921722348 23 32127865392 24 94578844458 25 278614855862 26 821281118993 27 2422356077357 28 7148679142639