Numerators of rational valued sequence whose Dirichlet convolution with itself yields A005187.

Terms

a(0) =1a(1) =3a(2) =2a(3) =19a(4) =4a(5) =2a(6) =11a(7) =63a(8) =6a(9) =3a(10) =19a(11) =13a(12) =23a(13) =17a(14) =5a(15) =867a(16) =16a(17) =4a(18) =35a(19) =5a(20) =17a(21) =25a(22) =21a(23) =11a(24) =31a(25) =29a(26) =13a(27) =113a(28) =27a(29) =13