# A308445 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 7 4 18 5 34 6 104 7 174 8 510 9 1082 10 2714 11 4658 12 16316 13 25634 14 71978 15 169258 16 419878 17 712386 18 2349160 19 3773934 20 11980874 21 25033510 22 59450390 23 104012646 24 368769280 25 625406094 26 1645569502 27 3654549058 28 9504389550 29 16006708782 30 55050007424 31 87063424990