# A187984 (b-file synthesized from sequence entry) 1 0 2 5 3 11 4 39 5 144 6 467 7 1673 8 5825 9 20404 10 72246 11 255137 12 905611 13 3220635 14 11472797 15 40956011 16 146412581 17 524169045 18 1878990744 19 6743276222 20 24225861208 21 87117117408 22 313552816720 23 1129460906243 24 4071526431770 25 14687417557462 26 53016891233217 27 191489301052386 28 692020548649474 29 2502200138127277 30 9051895373199102 31 32761105883346693