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A286961 as a simple table

na(n)
01
11
2110
3111
410100
51111
61011000
7101111
8100010000
911111
1011111100000
11111111
1211001000000
1310000101111111
14110000000
151100000011111111
16111100000000
171100010111111111
181101001011000000000
191011011001111111111
2010110000010000000000

[1,1,110,111,10100,1111,1011000,101111,100010000,
 11111,11111100000,111111,11001000000,
 10000101111111,110000000,1100000011111111,
 111100000000,1100010111111111,1101001011000000000,
 1011011001111111111,10110000010000000000]