Zsigmondy numbers for a = 5, b = 3: Zs(n, 5, 3) is the greatest divisor of 5^n - 3^n (A005058) that is relatively prime to 5^m - 3^m for all positive integers m < n.
A109347
Zsigmondy numbers for a = 5, b = 3: Zs(n, 5, 3) is the greatest divisor of 5^n - 3^n (A005058) that is relatively prime to 5^m - 3^m for all positive integers m < n.
Terms
- a(0) =2a(1) =1a(2) =49a(3) =17a(4) =1441a(5) =19a(6) =37969a(7) =353a(8) =19729a(9) =421a(10) =24325489a(11) =481a(12) =609554401a(13) =10039a(14) =216001a(15) =198593a(16) =381405156481a(17) =12979a(19) =288961a(20) =18306583a(21) =6125659a(23) =346561a(25) =152787181a(27) =179655841
External references
- oeis: A109347