# A148860 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 8 4 28 5 96 6 349 7 1294 8 4928 9 19203 10 76086 11 305502 12 1242251 13 5100276 14 21134073 15 88267969 16 371224527 17 1571306552 18 6688704784 19 28618871601 20 123033231031 21 531189061092 22 2302467195000 23 10016716673010 24 43723850494820 25 191458643525064 26 840812942650704 27 3702591477065075 28 16346395729010517