# A297438 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 3 5 7 6 12 7 29 8 56 9 134 10 283 11 672 12 1496 13 3568 14 8214 15 19678 16 46364 17 111766 18 267467 19 648941 20 1570540 21 3833777 22 9357181 23 22967808 24 56430230 25 139193762 26 343825265 27 851777363 28 2113382992 29 5255584309 30 13089273904