# A149108 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 8 4 35 5 98 6 431 7 1361 8 6203 9 21117 10 97367 11 349863 12 1628534 13 6075216 14 28476830 15 109268287 16 514736603 17 2019723490 18 9551131625 19 38146488279 20 180943166799 21 733323214843 22 3486859436279 23 14304847475503 24 68153275274225 25 282505125588502 26 1348167924533795 27 5638208585217986 28 26943787555922353