Numbers n such that sigma(n) = sigma(n - phi(n)), where sigma(n) is the sum of divisors of n and phi(n) is the Euler totient function of n.

A228519

Numbers n such that sigma(n) = sigma(n - phi(n)), where sigma(n) is the sum of divisors of n and phi(n) is the Euler totient function of n.

Terms

    a(0) =9356a(1) =52412a(2) =110442a(3) =160834a(4) =220884a(5) =266866a(6) =289230a(7) =321668a(8) =420790a(9) =441768a(10) =533732a(11) =556818a(12) =578460a(13) =643336a(14) =731530a(15) =841580a(16) =883536a(17) =1067464a(18) =1113636a(19) =1156920a(20) =1286672a(21) =1446150a(22) =1463060a(23) =1683160a(24) =1767072a(25) =2103950a(26) =2134928a(27) =2227272a(28) =2313840a(29) =2545888

External references