A217469 Multiplicative order of 5 (mod 5*n + 1).

2, 5, 4, 6, 4, 3, 6, 20, 22, 16, 6, 30, 10, 5, 9, 54, 42, 12, 8, 25, 52, 36, 14, 55, 6, 65, 16, 46, 72, 75, 4, 66, 82, 18, 20, 15, 6, 19, 42, 22, 102, 35, 18, 16, 112, 30, 29, 40, 20, 25, 64, 42, 18, 27, 22, 140, 20, 96, 36, 42, 48, 155, 39, 106, 54, 165, 12, 15

Offset

1,1

Comments

Least m such that 5*n + 1 divides 5^m - 1.

Links

Arkadiusz Wesolowski, Table of n, a(n) for n = 1..10000

Eric Weisstein's World of Mathematics, Multiplicative Order

Mathematica

Table[MultiplicativeOrder[5, 5*n + 1], {n, 68}]

Prog

(PARI) vector(80, n, znorder(Mod(5, 5*n+1))) \\ Michel Marcus, Feb 09 2015
(GAP) List([1..80], n->OrderMod(5, 5*n+1)); # Muniru A Asiru, Feb 26 2019

Crossrefs

Cf. A002326, A003571, A003573.

Sequence in context: A163809 A075771 A198813 * A132698 A358181 A114557

Adjacent sequences: A217466 A217467 A217468 * A217470 A217471 A217472

Keyword

nonn

Author

Arkadiusz Wesolowski, Nov 16 2012

Status

approved