# A097118 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 6 4 16 5 31 6 76 7 201 8 481 9 1141 10 2806 11 6876 12 16651 13 40456 14 98641 15 240081 16 583801 17 1420726 18 3458056 19 8414391 20 20474356 21 49824601 22 121246801 23 295040781 24 717957766 25 1747108756 26 4251463651 27 10345607376 28 25175294881 29 61262300641