# A054668 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 8 5 16 6 30 7 56 8 104 9 192 10 354 11 652 12 1200 13 2208 14 4062 15 7472 16 13744 17 25280 18 46498 19 85524 20 157304 21 289328 22 532158 23 978792 24 1800280 25 3311232 26 6090306 27 11201820 28 20603360 29 37895488 30 69700670 31 128199520