Numbers k such that the determinant of the Vandermonde matrix of their digits is equal to phi(k), the Euler totient function of k.

A307587

Numbers k such that the determinant of the Vandermonde matrix of their digits is equal to phi(k), the Euler totient function of k.

Terms

    a(0) =1a(1) =2a(2) =190a(3) =280a(4) =480a(5) =1073a(6) =1674a(7) =1736a(8) =4850a(9) =15867a(10) =16230a(11) =16302a(12) =23715a(13) =24056a(14) =25064a(15) =35712a(16) =52976a(17) =54730a(18) =75184a(19) =105342a(20) =456382a(21) =964325

External references