# A148076 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 9 5 21 6 61 7 174 8 529 9 1641 10 5095 11 16033 12 53457 13 179040 14 611600 15 2114005 16 7286191 17 25434141 18 90624740 19 324820786 20 1175997883 21 4277780903 22 15565099278 23 57172451188 24 211915699815 25 789384452140 26 2957220530771 27 11099880354961 28 41758569166532 29 158093763382620 30 601507196523586 31 2297362832884187