# A214693 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 34 4 338 5 3691 6 42623 7 510949 8 6289912 9 78972928 10 1006665781 11 12985611054 12 169115724583 13 2219614920740 14 29318819296959 15 389331204757856 16 5192978617937181 17 69522908878900079 18 933674035184058960 19 12571898958515379108 20 169651868248129552194