# A148211 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 12 5 36 6 123 7 422 8 1556 9 5797 10 22512 11 88244 12 355082 13 1441038 14 5951551 15 24763384 16 104316842 17 442258945 18 1892124241 19 8139630740 20 35259782511 21 153461173363 22 671582239139 23 2950933397118 24 13024116086453 25 57684461929497 26 256428223442345 27 1143394392156529 28 5114133402269907