# A328681 (b-file synthesized from sequence entry) 1 1 2 6 3 20 4 55 5 142 6 322 7 779 8 1608 9 3894 10 7370 11 18372 12 33137 13 81512 14 149694 15 353224 16 641461 17 1570836 18 2684928 19 6642915 20 11795178 21 28133846 22 46768200 23 125433400 24 197654545 25 485749918 26 893864394 27 2066417482 28 3385115393 29 8975476976 30 14384181908 31 35478028091 32 61940000322