# A216215 (b-file synthesized from sequence entry) 0 1 1 2 2 2 3 6 4 12 5 28 6 54 7 118 8 230 9 490 10 968 11 1980 12 3978 13 8066 14 16100 15 32494 16 64994 17 130468 18 261000 19 523092 20 1046292 21 2094812 22 4189704 23 8383732 24 16768206 25 33545152 26 67090578 27 134199252 28 268399910 29 536834026 30 1073671504 31 2147411556 32 4294826718 33 8589792856 34 17179592372 35 34359455674