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A003561 Least number m such that 5^m = +- 1 mod 5n + 1. 1
1, 5, 4, 3, 2, 3, 6, 10, 11, 16, 6, 15, 10, 5, 9, 27, 21, 12, 8, 25, 26, 36, 14, 55, 3, 65, 16, 23, 36, 75, 4, 33, 41, 18, 20, 15, 6, 19, 42, 11, 51, 35, 18, 16, 56, 30, 29, 20, 20, 25, 64, 21, 18, 27, 22, 70, 20, 96, 36 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..58.

CROSSREFS

Sequence in context: A190302 A223475 A190137 * A201327 A081760 A261218

Adjacent sequences:  A003558 A003559 A003560 * A003562 A003563 A003564

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified February 18 19:54 EST 2019. Contains 320262 sequences. (Running on oeis4.)