# A297103 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 2 5 5 6 7 7 10 8 20 9 41 10 67 11 110 12 220 13 441 14 767 15 1335 16 2670 17 5341 18 9587 19 17211 20 34422 21 68845 22 126011 23 230655 24 461310 25 922621 26 1711595 27 3175311 28 6350622 29 12701245 30 23796515 31 44584536 32 89169072 33 178338145