# A048248 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 7 5 14 6 23 7 45 8 72 9 137 10 217 11 402 12 635 13 1149 14 1816 15 3221 16 5101 17 8898 18 14127 19 24305 20 38688 21 65809 22 105009 23 176962 24 282995 25 473269 26 758312 27 1260253 28 2022661 29 3344354 30 5375207