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A278787 as a simple table

na(n)
01
111
211
3111
41011
510111
6101011
71000111
811011011
9100000111
101100011011
1111101000111
12100011011011
131101110000111
1410000110011011
15110011111000111
161011000011011011
1710011001010000111
18111111110110011011
191000000000011000111
2011000000001111011011

[1,11,11,111,1011,10111,101011,1000111,11011011,
 100000111,1100011011,11101000111,100011011011,
 1101110000111,10000110011011,110011111000111,
 1011000011011011,10011001010000111,
 111111110110011011,1000000000011000111,
 11000000001111011011]