# A275448 (b-file synthesized from sequence entry) 2 1 3 2 4 3 5 4 6 6 7 12 8 28 9 65 10 146 11 327 12 749 13 1756 14 4165 15 9913 16 23652 17 56687 18 136627 19 330969 20 804915 21 1963830 22 4805523 23 11793046 24 29019930 25 71589861 26 177006752 27 438561959 28 1088714711 29 2707615555 30 6745272783 31 16830750107 32 42058592797 33 105248042792