Numbers k such that 1/(1/phi(k) + 1/phi(k+1) + 1/phi(k+2) + 1/phi(k+3) + 1/phi(k+4)) is an integer.

A341745

Numbers k such that 1/(1/phi(k) + 1/phi(k+1) + 1/phi(k+2) + 1/phi(k+3) + 1/phi(k+4)) is an integer.

Terms

    a(0) =30a(1) =31a(2) =35a(3) =73a(4) =19800a(5) =291721a(6) =298200a(7) =539401a(8) =3150841a(9) =7650726a(10) =12285002a(11) =19571764a(12) =21818162a(13) =27017642a(14) =33636241a(15) =50441042a(16) =50810762a(17) =51760802a(18) =71866082a(19) =75479042a(20) =78001562a(21) =81235442a(22) =104881681a(23) =112123440a(24) =125756282a(25) =132055562a(26) =137382482a(27) =153742682a(28) =158918762

External references