Duplicate of A069869.

Terms

a(0) =0a(1) =11a(2) =3a(3) =211a(4) =2111a(5) =0a(6) =112111a(7) =1111211a(8) =0a(9) =11131111a(10) =1121111111a(11) =0a(12) =111211111111a(14) =0a(17) =0a(20) =0a(23) =0