Dirichlet convolution of sigma(n) with itself.

Terms

a(0) =1a(1) =6a(2) =8a(3) =23a(4) =12a(5) =48a(6) =16a(7) =72a(8) =42a(9) =72a(10) =24a(11) =184a(12) =28a(13) =96a(14) =96a(15) =201a(16) =36a(17) =252a(18) =40a(19) =276a(20) =128a(21) =144a(22) =48a(23) =576a(24) =98a(25) =168a(26) =184a(27) =368a(28) =60a(29) =576