# A027291 (b-file synthesized from sequence entry) 0 1 1 3 2 8 3 16 4 39 5 77 6 179 7 354 8 799 9 1584 10 3504 11 6960 12 15174 13 30183 14 65085 15 129598 16 277071 17 552140 18 1172348 19 2337624 20 4935586 21 9845978 22 20691318 23 41292196 24 86432614 25 172538352 26 359934704 27 718680768 28 1494861996 29 2985378027