# A190908 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 15 4 49 5 163 6 549 7 1875 8 6477 9 22571 10 79213 11 279631 12 991985 13 3533707 14 12632909 15 45301795 16 162890781 17 587091795 18 2120442517 19 7672891151 20 27811187377 21 100956896179 22 366983328885 23 1335662387699