# A149212 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 10 4 40 5 138 6 569 7 2207 8 9475 9 38862 10 171853 11 731033 12 3296604 13 14403076 14 65845587 15 293512383 16 1355814054 17 6136514157 18 28582369960 19 130907882612 20 613896177053 21 2838425700786 22 13386014505024 23 62374534078528 24 295548379214727 25 1386106527249600 26 6594151582316189 27 31095579594247858