# A164991 (b-file synthesized from sequence entry) 1 1 2 1 3 3 4 6 5 13 6 26 7 54 8 108 9 221 10 442 11 898 12 1796 13 3634 14 7268 15 14668 16 29336 17 59101 18 118202 19 237834 20 475668 21 956198 22 1912396 23 3841588 24 7683176 25 15425138 26 30850276 27 61908564 28 123817128 29 248377156 30 496754312