# A103446 (b-file synthesized from sequence entry) 0 0 1 1 2 3 3 8 4 21 5 54 6 137 7 344 8 856 9 2113 10 5179 11 12614 12 30548 13 73595 14 176455 15 421215 16 1001388 17 2371678 18 5597245 19 13166069 20 30873728 21 72185937 22 168313391 23 391428622 24 908058205 25 2101629502 26 4853215947 27 11183551059 28 25718677187 29 59030344851 30 135237134812