# A180238 (b-file synthesized from sequence entry) 0 1 1 3 2 9 3 27 4 75 5 189 6 447 7 951 8 1911 9 3621 10 6513 11 11103 12 18267 13 29013 14 44691 15 67251 16 98547 17 140865 18 197679 19 272799 20 370659 21 497403 22 658371 23 859863 24 1110453 25 1420527 26 1799373 27 2260161 28 2815401 29 3479235 30 4269279