# A037689 (b-file synthesized from sequence entry) 1 1 2 7 3 35 4 178 5 891 6 4457 7 22285 8 111428 9 557141 10 2785707 11 13928535 12 69642678 13 348213391 14 1741066957 15 8705334785 16 43526673928 17 217633369641 18 1088166848207 19 5440834241035 20 27204171205178 21 136020856025891 22 680104280129457