a(n) = A276086(n)*A276086(sigma(n)-n) - A276086(sigma(n)), where A276086 is the primorial base exp-function, and sigma is the sum of divisors function.

A388281

a(n) = A276086(n)*A276086(sigma(n)-n) - A276086(sigma(n)), where A276086 is the primorial base exp-function, and sigma is the sum of divisors function.

Terms

    a(0) =0a(1) =0a(2) =3a(3) =44a(4) =31a(5) =0a(6) =5a(7) =0a(8) =220a(9) =550a(10) =155a(11) =0a(12) =25a(13) =2750a(14) =3875a(15) =33736a(16) =775a(17) =93540a(18) =125a(19) =421700a(20) =67479a(21) =84340a(22) =3875a(23) =21826a(24) =6236a(25) =421700a(26) =187185a(27) =31627500a(28) =22493a(29) =0

External references