# A277395 (b-file synthesized from sequence entry) 0 1 1 3 2 9 3 33 4 145 5 713 6 3745 7 20513 8 115713 9 667329 10 3916033 11 23305857 12 140327681 13 853262465 14 5231925761 15 32313686529 16 200843829249 17 1255308123137 18 7884792852481 19 49745076576257 20 315091155558401 21 2003009460686849 22 12774610185633793