# A100249 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 6 5 15 6 29 7 63 8 160 9 333 10 749 11 1914 12 4135 13 9490 14 24335 15 53791 16 125104 17 321521 18 721887 19 1694914 20 4362855 21 9907851 22 23429158 23 60379623 24 138320021 25 328917615 26 848432824 27 1957091277 28 4674847097 29 12067450014 30 27992976565