A109348 Zsigmondy numbers for a = 7, b = 3: Zs(n, 7, 3) is the greatest divisor of 7^n - 3^n that is relatively prime to 7^m - 3^m for all positive integers m < n.

4, 5, 79, 29, 4141, 37, 205339, 1241, 127639, 341, 494287399, 2041, 24221854021, 82573, 3628081, 2885681, 58157596211761, 109117, 2849723505777919, 4871281, 8607961321, 197750389, 6842186811484434379, 5576881, 80962848274370701

Offset

1,1

Links

Table of n, a(n) for n=1..25.

Eric Weisstein's World of Mathematics, Zsigmondy's Theorem

Crossrefs

Cf. A064078-A064083, A109325, A109347, A109349.

Sequence in context: A013331 A226145 A042425 * A192084 A078985 A041173

Adjacent sequences: A109345 A109346 A109347 * A109349 A109350 A109351

Keyword

nonn

Author

Jonathan Vos Post, Aug 21 2005

Extensions

Edited, corrected and extended by Ray Chandler, Aug 26 2005

Definition corrected by Jerry Metzger, Nov 04 2009

Status

approved