# A173289 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 4 4 6 5 9 6 14 7 23 8 41 9 76 10 151 11 310 12 665 13 1467 14 3325 15 7672 16 18031 17 42925 18 103448 19 251732 20 618051 21 1528777 22 3807435 23 9539015 24 24029260 25 60826848 26 154666260 27 394882063 28 1011987677 29 2602494798 30 6714341561 31 17374649352 32 45085903121