# A168156 (b-file synthesized from sequence entry) 1 0 2 3 3 5 4 6 5 18 6 29 7 56 8 113 9 240 10 452 11 885 12 1790 13 3474 14 6951 15 13671 16 27183 17 54201 18 107224 19 213882 20 424513 21 845716 22 1682456 23 3350362 24 6671581 25 13299828 26 26500297 27 52829961 28 105342821 29 210088965 30 419106389 31 836097752 32 1668341390 33 3329412989 34 6645128078