# A203838 (b-file synthesized from sequence entry) 1 1 2 9 3 56 4 219 5 630 6 2016 7 4472 8 12285 9 25738 10 62370 11 118548 12 294336 13 512134 14 1167192 15 2152080 16 4620147 17 7847658 18 17604792 19 28681660 20 62224470 21 105431872 22 212319468 23 348698376 24 759507840 25 1181718775 26 2401396326 27 4014783920 28 7980869832 29 12542045310