# A149123 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 9 4 34 5 97 6 373 7 1215 8 4768 9 16429 10 65917 11 237771 12 968122 13 3580933 14 14767182 15 55993927 16 232930254 17 896421657 18 3758595523 19 14693407001 20 61959876696 21 244614547867 22 1037022804734 23 4138819773135 24 17616327456336 25 70804442020279 26 302527380401375 27 1225683396052321 28 5252426395066506