# A148009 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 8 5 15 6 44 7 101 8 324 9 807 10 2562 11 6874 12 22021 13 63456 14 208798 15 634362 16 2070911 17 6467596 18 21207233 19 68259541 20 227890492 21 755089500 22 2534135422 23 8468506831 24 28559647176 25 96623136254 26 330263074825 27 1136529083058 28 3923257279683 29 13556679447462 30 46939729799301 31 163098846274142 32 569596080479337