# A025578 (b-file synthesized from sequence entry) 1 1 2 3 3 8 4 23 5 67 6 197 7 582 8 1725 9 5124 10 15245 11 45412 12 135401 13 404015 14 1206247 15 3603230 16 10767855 17 32189931 18 96259221 19 287924196 20 861415809 21 2577711045 22 7714933851 23 23093949534 24 69139301043 25 207017139906 26 619921659303 27 1856572250112