# A152090 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 3 4 7 5 16 6 39 7 91 8 217 9 513 10 1216 11 2881 12 6825 13 16171 14 38311 15 90768 16 215047 17 509491 18 1207089 19 2859841 20 6775552 21 16052673 22 38032081 23 90105811 24 213479175 25 505776016 26 1198287271 27 2838988683 28 6726147337 29 15935624641 30 37754768064