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A272681 as a simple table

na(n)
00
11
2100
311001
4100
51010001
611001
71111001
810000
91001
101010001
11101101001
1211001
13110111001
1411100001
151111001
1610000
1710001000001
18100100
191001110001
201010001
2110101001
22101101001
2310111110001
24110001
2511001
261101001001
27110111001
2811100001
29111010001001

[0,1,100,11001,100,1010001,11001,1111001,10000,
 1001,1010001,101101001,11001,110111001,11100001,
 1111001,10000,10001000001,100100,1001110001,
 1010001,10101001,101101001,10111110001,110001,
 11001,1101001001,110111001,11100001,111010001001]