# A204520 (b-file synthesized from sequence entry) 1 0 2 1 3 2 4 3 5 7 6 9 7 18 8 47 9 123 10 161 11 322 12 843 13 2207 14 2889 15 5778 16 15127 17 39603 18 51841 19 103682 20 271443 21 710647 22 930249 23 1860498 24 4870847 25 12752043 26 16692641 27 33385282