A003561 Least number m such that 5^m == +- 1 (mod 5n + 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, 21, 48, 155, 39, 53, 27, 165, 12, 15

Offset

1,2

Links

Table of n, a(n) for n=1..68.

Crossrefs

Sequence in context: A190302 A223475 A190137 * A201327 A329457 A081760

Adjacent sequences: A003558 A003559 A003560 * A003562 A003563 A003564

Keyword

nonn

Author

N. J. A. Sloane

Status

approved