# A148337 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 14 5 47 6 143 7 473 8 1629 9 5605 10 20435 11 73465 12 269905 13 1008533 14 3767243 15 14375250 16 54928164 17 211709811 18 822476562 19 3204543546 20 12593678660 21 49651915597 22 196804253006 23 783229067840 24 3127723687414 25 12544032531028 26 50446880736135 27 203642910438415 28 824114620749925 29 3344745342125251