Partial sums of usigma(n)^2: square of the sum of unitary divisors of n.

A074789

Partial sums of usigma(n)^2: square of the sum of unitary divisors of n.

Terms

    a(0) =1a(1) =10a(2) =26a(3) =51a(4) =87a(5) =231a(6) =295a(7) =376a(8) =476a(9) =800a(10) =944a(11) =1344a(12) =1540a(13) =2116a(14) =2692a(15) =2981a(16) =3305a(17) =4205a(18) =4605a(19) =5505a(20) =6529a(21) =7825a(22) =8401a(23) =9697a(24) =10373a(25) =12137a(26) =12921a(27) =14521a(28) =15421a(29) =20605

External references