# A048755 (b-file synthesized from sequence entry) 0 1 1 7 2 20 3 52 4 129 5 315 6 764 7 1848 8 4465 9 10783 10 26036 11 62860 12 151761 13 366387 14 884540 15 2135472 16 5155489 17 12446455 18 30048404 19 72543268 20 175134945 21 422813163 22 1020761276 23 2464335720 24 5949432721 25 14363201167 26 34675835060 27 83714871292 28 202105577649 29 487926026595