# A192010 (b-file synthesized from sequence entry) 1 1 2 4 3 12 4 36 5 132 6 396 7 1716 8 5148 9 25740 10 87516 11 437580 12 1662804 13 8314020 14 38244492 15 167943204 16 839716020 17 3862693692 18 17298150012 19 86490750060 20 397857450276 21 1850902051284 22 9254510256420 23 42570747179532 24 201748323589956 25 1008741617949780 26 4640211442568988