a(n) = sigma_3(n)*Pell(n), where sigma_3(n) = A001158(n), the sum of cubes of divisors of n.

A204273

a(n) = sigma_3(n)*Pell(n), where sigma_3(n) = A001158(n), the sum of cubes of divisors of n.

Terms

    a(0) =1a(1) =18a(2) =140a(3) =876a(4) =3654a(5) =17640a(6) =58136a(7) =238680a(8) =745645a(9) =2696652a(10) =7647012a(11) =28329840a(12) =73547278a(13) =250101072a(14) =688048200a(15) =2203964592a(16) =5585689746a(17) =18696302730a(18) =45448247740a(19) =147116748744a(20) =371929710880

External references