a(n) = least composite number such that sigma(a(n)+n!) = sigma(a(n))+n! where sigma() = A000203.

A054982

a(n) = least composite number such that sigma(a(n)+n!) = sigma(a(n))+n! where sigma() = A000203.

Terms

    a(0) =434a(1) =104a(2) =80a(3) =182a(4) =427a(5) =1727a(6) =4147a(7) =7163a(8) =42031a(9) =165841a(10) =569257a(11) =2683909a(12) =10040081a(13) =39094849a(14) =155533969a(15) =717519401a(16) =3041377519a(17) =16076525809a(18) =71749935913

External references