# A150107 (b-file synthesized from sequence entry) 0 1 1 2 2 6 3 19 4 69 5 258 6 1014 7 4082 8 16800 9 70383 10 299011 11 1284372 12 5572651 13 24374059 14 107358625 15 475819313 16 2120059036 17 9490995387 18 42668497139 19 192542510134 20 871799541820 21 3959436307454 22 18032344193044 23 82332352883961 24 376785054885822 25 1727985033292291 26 7940321135142378 27 36553005597894890