# A047145 (b-file synthesized from sequence entry) 3 1 4 5 5 19 6 68 7 250 8 935 9 3473 10 12850 11 48066 12 181540 13 686960 14 2600830 15 9893064 16 37819055 17 144917337 18 556011134 19 2138565128 20 8248348136 21 31873293528 22 123320614254 23 477883163716 24 1855021589250 25 7210702449848 26 28058894828756