Numerators of the sequence whose Dirichlet convolution with itself yields A018804, Pillai's arithmetical function: Sum_{k=1..n} gcd(k, n).
A318443
Numerators of the sequence whose Dirichlet convolution with itself yields A018804, Pillai's arithmetical function: Sum_{k=1..n} gcd(k, n).
Terms
- a(0) =1a(1) =3a(2) =5a(3) =23a(4) =9a(5) =15a(6) =13a(7) =91a(8) =59a(9) =27a(10) =21a(11) =115a(12) =25a(13) =39a(14) =45a(15) =1451a(16) =33a(17) =177a(18) =37a(19) =207a(20) =65a(21) =63a(22) =45a(23) =455a(24) =179a(25) =75a(26) =353a(27) =299a(28) =57a(29) =135
External references
- oeis: A318443